feat(api): wire IEmailTemplateService; replace Contact:ToEmail with OperatorCopy

- Add ProjectReference to email-api-data
- Register EmailApiDbContext (no migrate — email-api owns migrations)
- Register IEmailTemplateRepository (scoped) and IEmailTemplateService (singleton)
- EmailApiEmailSender: replace ITemplateService with IEmailTemplateService for
  all email.* template rendering (match body/subject/footer)
- SendMatchAsync: replace _contact.ToEmail operator copy with
  GetOperatorCopy("email.match.subject", "en") from DB template

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

Apis/api/Program.cs

@@ -1,6 +1,10 @@
 using System.Reflection;
 using Api.Services;
 using Api.Services.Contracts;
+using EmailApi.Data;
+using EmailApi.Data.Repositories;
+using EmailApi.Data.Repositories.Contracts;
+using EmailApi.Data.Services;
 using EmailApi.Models.Clients;
 using EmailApi.Models.Settings;
 using Microsoft.EntityFrameworkCore;
@@ -47,6 +51,19 @@ try
     });
     builder.Services.AddSingleton<ITemplateService, DbTemplateService>();
 
+    builder.Services.AddDbContext<EmailApiDbContext>(options =>
+    {
+        var connectionString = builder.Services.GetConfiguredDbConnectionString(builder.Configuration);
+        options.UseSqlServer(connectionString, sql =>
+        {
+            sql.MigrationsHistoryTable(EmailApiDbContext.MigrationTableName, EmailApiDbContext.SchemaName);
+            sql.MigrationsAssembly("email-api-data");
+        });
+    });
+
+    builder.Services.AddScoped<IEmailTemplateRepository, EfEmailTemplateRepository>();
+    builder.Services.AddSingleton<IEmailTemplateService, EmailTemplateService>();
+
     builder.Services.AddHttpClient<ICaptchaVerifier, RecaptchaVerifier>();
     builder.Services.AddSingleton<IEmailSender, EmailApiEmailSender>();
     builder.Services.AddSingleton<Microsoft.AspNetCore.StaticFiles.IContentTypeProvider, Microsoft.AspNetCore.StaticFiles.FileExtensionContentTypeProvider>();