refactor: restructure solution into -models/-data/-api project taxonomy

Phases 1-10 of the planned refactoring:

Phase 1: rename shared-models -> common
  - namespace Shared.Models -> Common throughout
  - remove stale AspNetCore.Http.Features 5.0 reference

Phase 2: create shared-data with abstract BaseEntity
  - BaseEntity: required string Id { get; init; } + DateTime CreatedAt { get; init; }

Phase 3: rename myai-models -> myai-data
  - namespace MyAi.Models -> MyAi.Data
  - MigrationsAssembly("myai-data")

Phase 4: rename cv-search-models -> cv-search-data
  - namespace CvSearch.Models -> CvSearch.Data
  - move JobSearchSettings to cv-matcher-api-models
  - JobSearch*Entity now inherits BaseEntity

Phase 5: extract rag-data from rag-api
  - new project: Apis/rag-data with RagDbContext + entities + migrations
  - RagDocumentEntity inherits BaseEntity; cache entities use CacheKey PK
  - fix duplicate AddHttpClient<RagAiClient>/AddScoped registrations in rag-api
  - MigrationsAssembly("rag-data")

Phase 6: extract cv-matcher-data from cv-matcher-api
  - new project: Apis/cv-matcher-data with CvMatcherDbContext + entities + migrations
  - CvMatchResultEntity inherits BaseEntity; CvMatcherChatCacheEntity uses CacheKey PK
  - MigrationsAssembly("cv-matcher-data")

Phase 7: create empty cv-cleanup-job-models and cv-search-job-models

Phase 8: update all 5 Dockerfiles for renamed/new projects

Phase 9: reorganise .sln virtual folders (Apis/Jobs/Models/Data/Helpers)
  - update root CLAUDE.md with new project taxonomy and migration commands
  - update cv-matcher-api/CLAUDE.md and cv-search-job/CLAUDE.md

Phase 10: add Directory.Packages.props for centralised NuGet versions
  - remove Version= from all PackageReference elements in active .csproj files

No database changes. No runtime behaviour changes.
All MigrationId strings in __EFMigrationsHistory are unaffected.

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

Apis/common/Requests/UploadFileRequest.cs

@@ -0,0 +1,11 @@
+using Microsoft.AspNetCore.Http;
+using System.ComponentModel.DataAnnotations;
+
+namespace Common.Requests
+{
+    public class UploadFileRequest
+    {
+        [Required]
+        public IFormFile File { get; set; } = default!;
+    }
+}

Apis/common/Responses/ErrorResponse.cs

@@ -0,0 +1,9 @@
+namespace Common.Responses;
+
+public sealed class ErrorResponse
+{
+    public string Error { get; init; } = string.Empty;
+    public string? Code { get; init; }
+    public string? Detail { get; init; }
+    public double? Score { get; init; }
+}

Apis/common/Settings/AiSettings.cs

@@ -0,0 +1,7 @@
+namespace Common.Settings
+{
+    public class AiSettings
+    {
+        public string Provider { get; set; } = "OpenAI";
+    }
+}

Apis/common/Settings/DatabaseSettings.cs

@@ -0,0 +1,12 @@
+namespace Common.Settings
+{
+    public class DatabaseSettings
+    {
+        public string Host { get; set; } = "";
+        public int Port { get; set; }
+        public string Name { get; set; } = "";
+        public string User { get; set; } = "";
+        public string Password { get; set; } = "";
+        public bool TrustServerCertificate { get; set; }
+    }
+}

Apis/common/Settings/InternalApiSettings.cs

@@ -0,0 +1,8 @@
+namespace Common.Settings
+{
+    public class InternalApiSettings
+    {
+        public string ApiKey { get; set; } = string.Empty;
+        public bool RequireApiKey { get; set; } = false;
+    }
+}

Apis/common/Settings/OllamaSettings.cs

@@ -0,0 +1,9 @@
+namespace Common.Settings
+{
+    public class OllamaSettings
+    {
+        public string BaseUrl { get; set; } = "http://localhost:11434";
+        public string ChatModel { get; set; } = "llama3.1:8b";
+        public int TimeoutSeconds { get; set; } = 180;
+    }
+}

Apis/common/Settings/OpenAiSettings.cs

@@ -0,0 +1,9 @@
+namespace Common.Settings
+{
+    public class OpenAiSettings
+    {
+        public string ApiKey { get; set; } = string.Empty;
+        public string ChatModel { get; set; } = "gpt-4o-mini";
+        public int TimeoutSeconds { get; set; } = 90;
+    }
+}

Apis/common/Settings/RateLimitingSettings.cs

@@ -0,0 +1,20 @@
+namespace Common.Settings
+{
+    public class RateLimitingSettings
+    {
+        public RateLimitPolicySettings Global { get; set; } = new();
+        public Dictionary<string, RateLimitPolicySettings> Policies { get; set; } = new();
+    }
+
+    public class RateLimitPolicySettings
+    {
+        public int PermitLimit { get; set; } = 100;
+
+        // Bound from configuration strings like "00:01:00" (1 minute) or "00:10:00" (10 minutes).
+        public TimeSpan Window { get; set; } = TimeSpan.FromMinutes(1);
+
+        public int QueueLimit { get; set; } = 0;
+
+        public bool AutoReplenishment { get; set; } = true;
+    }
+}

Apis/common/common.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <AssemblyName>common</AssemblyName>
+    <RootNamespace>Common</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
+  </ItemGroup>
+
+</Project>