feat(cv-search-data): add JobProviders table to cvSearch schema

New JobProviderEntity persists provider config (name, URL template,
link filter, initial keywords, max results, display order) in the DB
instead of appsettings. Migration seeds three disabled defaults:
ejobs.ro, bestjobs.eu, and linkedin.com.

Closes #35

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Apis/cv-search-data/Data/CvSearchDbContext.cs

@@ -13,6 +13,7 @@ public sealed class CvSearchDbContext : DbContext
     public DbSet<JobSearchTokenEntity> JobSearchTokens => Set<JobSearchTokenEntity>();
     public DbSet<JobSearchSessionEntity> JobSearchSessions => Set<JobSearchSessionEntity>();
     public DbSet<JobSearchResultEntity> JobSearchResults => Set<JobSearchResultEntity>();
+    public DbSet<JobProviderEntity> JobProviders => Set<JobProviderEntity>();
 
     protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
     {
@@ -65,5 +66,18 @@ public sealed class CvSearchDbContext : DbContext
             entity.Property(x => x.CreatedAt).HasDefaultValueSql("SYSUTCDATETIME()");
             entity.HasIndex(x => x.SessionId);
         });
+
+        modelBuilder.Entity<JobProviderEntity>(entity =>
+        {
+            entity.ToTable("JobProviders");
+            entity.HasKey(x => x.Id);
+            entity.Property(x => x.Id).UseIdentityColumn();
+            entity.Property(x => x.Name).HasMaxLength(128).IsRequired();
+            entity.Property(x => x.SearchUrlTemplate).HasMaxLength(1024).IsRequired();
+            entity.Property(x => x.JobLinkContains).HasMaxLength(256).IsRequired();
+            entity.Property(x => x.InitialKeywordsJson).HasMaxLength(2000).HasDefaultValue("[]").IsRequired();
+            entity.Property(x => x.MaxResults).HasDefaultValue(20);
+            entity.Property(x => x.DisplayOrder).HasDefaultValue(0);
+        });
     }
 }

Apis/cv-search-data/Data/Entities/JobProviderEntity.cs

@@ -0,0 +1,33 @@
+namespace CvSearch.Data.Entities;
+
+/// <summary>
+/// Persisted job-board provider configuration. Stored in <c>cvSearch.JobProviders</c>.
+/// Providers are loaded from here at session-creation time and snapshotted into
+/// <c>JobSearchSessionEntity.ProviderConfigJson</c> so runtime config changes do not
+/// affect already-queued sessions.
+/// </summary>
+public sealed class JobProviderEntity
+{
+    public int Id { get; set; }
+
+    /// <summary>Display name (e.g. "ejobs.ro").</summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>When false the provider is skipped at session-creation and the job-search link is hidden.</summary>
+    public bool Enabled { get; set; }
+
+    /// <summary>URL template with <c>{keywords}</c> placeholder (URL-encoded keywords are substituted at runtime).</summary>
+    public string SearchUrlTemplate { get; set; } = string.Empty;
+
+    /// <summary>Substring that must appear in an anchor href to pass the stage-1 link filter.</summary>
+    public string JobLinkContains { get; set; } = string.Empty;
+
+    /// <summary>JSON array of baseline keywords merged with CV keywords before building the search URL.</summary>
+    public string InitialKeywordsJson { get; set; } = "[]";
+
+    /// <summary>Maximum number of job URLs to collect from this provider per session.</summary>
+    public int MaxResults { get; set; } = 20;
+
+    /// <summary>Controls display ordering in future admin UIs.</summary>
+    public int DisplayOrder { get; set; }
+}

Apis/cv-search-data/Migrations/20260529084440_AddJobProviders.Designer.cs

@@ -0,0 +1,222 @@
+// <auto-generated />
+using System;
+using CvSearch.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace CvSearch.Data.Migrations
+{
+    [DbContext(typeof(CvSearchDbContext))]
+    [Migration("20260529084440_AddJobProviders")]
+    partial class AddJobProviders
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasDefaultSchema("cvSearch")
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("CvSearch.Data.Entities.JobProviderEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("DisplayOrder")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasDefaultValue(0);
+
+                    b.Property<bool>("Enabled")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("InitialKeywordsJson")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(2000)
+                        .HasColumnType("nvarchar(2000)")
+                        .HasDefaultValue("[]");
+
+                    b.Property<string>("JobLinkContains")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<int>("MaxResults")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasDefaultValue(20);
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)");
+
+                    b.Property<string>("SearchUrlTemplate")
+                        .IsRequired()
+                        .HasMaxLength(1024)
+                        .HasColumnType("nvarchar(1024)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("JobProviders", "cvSearch");
+                });
+
+            modelBuilder.Entity("CvSearch.Data.Entities.JobSearchResultEntity", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("datetime2")
+                        .HasDefaultValueSql("SYSUTCDATETIME()");
+
+                    b.Property<string>("JobText")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("JobTitle")
+                        .IsRequired()
+                        .HasMaxLength(512)
+                        .HasColumnType("nvarchar(512)");
+
+                    b.Property<string>("JobUrl")
+                        .IsRequired()
+                        .HasMaxLength(2048)
+                        .HasColumnType("nvarchar(2048)");
+
+                    b.Property<string>("ProviderName")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)");
+
+                    b.Property<string>("ResultJson")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("Score")
+                        .HasColumnType("int");
+
+                    b.Property<string>("SessionId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("SessionId");
+
+                    b.ToTable("JobSearchResults", "cvSearch");
+                });
+
+            modelBuilder.Entity("CvSearch.Data.Entities.JobSearchSessionEntity", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("datetime2")
+                        .HasDefaultValueSql("SYSUTCDATETIME()");
+
+                    b.Property<string>("CvDocumentId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<string>("Keywords")
+                        .IsRequired()
+                        .HasMaxLength(1000)
+                        .HasColumnType("nvarchar(1000)");
+
+                    b.Property<string>("Language")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(8)
+                        .HasColumnType("nvarchar(8)")
+                        .HasDefaultValue("en");
+
+                    b.Property<string>("ProviderConfigJson")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Status")
+                        .IsRequired()
+                        .HasMaxLength(32)
+                        .HasColumnType("nvarchar(32)");
+
+                    b.Property<string>("TokenId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Status");
+
+                    b.ToTable("JobSearchSessions", "cvSearch");
+                });
+
+            modelBuilder.Entity("CvSearch.Data.Entities.JobSearchTokenEntity", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("datetime2")
+                        .HasDefaultValueSql("SYSUTCDATETIME()");
+
+                    b.Property<string>("CvDocumentId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<string>("Email")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("datetime2");
+
+                    b.Property<string>("Language")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(8)
+                        .HasColumnType("nvarchar(8)")
+                        .HasDefaultValue("en");
+
+                    b.Property<bool>("Used")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("bit")
+                        .HasDefaultValue(false);
+
+                    b.HasKey("Id");
+
+                    b.ToTable("JobSearchTokens", "cvSearch");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Apis/cv-search-data/Migrations/20260529084440_AddJobProviders.cs

@@ -0,0 +1,55 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CvSearch.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddJobProviders : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "JobProviders",
+                schema: "cvSearch",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    Name = table.Column<string>(type: "nvarchar(128)", maxLength: 128, nullable: false),
+                    Enabled = table.Column<bool>(type: "bit", nullable: false),
+                    SearchUrlTemplate = table.Column<string>(type: "nvarchar(1024)", maxLength: 1024, nullable: false),
+                    JobLinkContains = table.Column<string>(type: "nvarchar(256)", maxLength: 256, nullable: false),
+                    InitialKeywordsJson = table.Column<string>(type: "nvarchar(2000)", maxLength: 2000, nullable: false, defaultValue: "[]"),
+                    MaxResults = table.Column<int>(type: "int", nullable: false, defaultValue: 20),
+                    DisplayOrder = table.Column<int>(type: "int", nullable: false, defaultValue: 0)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_JobProviders", x => x.Id);
+                });
+
+            // Seed the three default providers — all disabled so the feature is opt-in per environment.
+            // Enable a provider by setting its Enabled column to 1 via SQL or a future admin UI.
+            migrationBuilder.InsertData(
+                schema: "cvSearch",
+                table: "JobProviders",
+                columns: ["Name", "Enabled", "SearchUrlTemplate", "JobLinkContains", "InitialKeywordsJson", "MaxResults", "DisplayOrder"],
+                values: new object[,]
+                {
+                    { "ejobs.ro",     false, "https://www.ejobs.ro/user/locuri-de-munca/?utm_source=myai&q={keywords}", "/user/locuri-de-munca/",      "[]", 20, 0 },
+                    { "bestjobs.eu",  false, "https://www.bestjobs.eu/ro/locuri-de-munca?keywords={keywords}",           "/ro/locuri-de-munca/",         "[]", 20, 1 },
+                    { "linkedin.com", false, "https://www.linkedin.com/jobs/search/?keywords={keywords}",                "/jobs/view/",                  "[]", 20, 2 },
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "JobProviders",
+                schema: "cvSearch");
+        }
+    }
+}

Apis/cv-search-data/Migrations/CvSearchDbContextModelSnapshot.cs

@@ -1,4 +1,4 @@
-// <auto-generated />
+// <auto-generated />
 using System;
 using CvSearch.Data;
 using Microsoft.EntityFrameworkCore;
@@ -23,6 +23,54 @@ namespace CvSearch.Data.Migrations
 
             SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
 
+            modelBuilder.Entity("CvSearch.Data.Entities.JobProviderEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("DisplayOrder")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasDefaultValue(0);
+
+                    b.Property<bool>("Enabled")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("InitialKeywordsJson")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(2000)
+                        .HasColumnType("nvarchar(2000)")
+                        .HasDefaultValue("[]");
+
+                    b.Property<string>("JobLinkContains")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<int>("MaxResults")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int")
+                        .HasDefaultValue(20);
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)");
+
+                    b.Property<string>("SearchUrlTemplate")
+                        .IsRequired()
+                        .HasMaxLength(1024)
+                        .HasColumnType("nvarchar(1024)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("JobProviders", "cvSearch");
+                });
+
             modelBuilder.Entity("CvSearch.Data.Entities.JobSearchResultEntity", b =>
                 {
                     b.Property<string>("Id")