feat: DB-backed localized templates + language-aware emails

- New Apis/myai-models project: MyAiDbContext (schema myAi), TemplateEntity,
  ITemplateService, DbTemplateService with 10-min in-memory cache
- Seeds EN+RO variants for all user-facing templates (match email, job search
  results email, HTML status pages, AI system prompt)
- Match result email now sent in user's UI language (en/ro)
- Job search results email now respects session language
- Language propagates: MatchJobRequest -> token -> session -> email
- Add Language column to JobSearchTokens and JobSearchSessions (default 'en')
- All three Dockerfiles updated to include myai-models in build context

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

Apis/cv-matcher-api/Services/JobTokenService.cs

@@ -30,13 +30,14 @@ public sealed class JobTokenService : IJobTokenService
         _logger = logger;
     }
 
-    public async Task<string> CreateTokenAsync(string cvDocumentId, string email, CancellationToken ct)
+    public async Task<string> CreateTokenAsync(string cvDocumentId, string email, string language, CancellationToken ct)
     {
         var token = new JobSearchTokenEntity
         {
             Id = Guid.NewGuid().ToString("N"),
             CvDocumentId = cvDocumentId,
             Email = email,
+            Language = language,
             ExpiresAt = DateTime.UtcNow.AddDays(_settings.TokenExpiryDays),
             Used = false,
             CreatedAt = DateTime.UtcNow
@@ -71,6 +72,7 @@ public sealed class JobTokenService : IJobTokenService
             TokenId = token.Id,
             CvDocumentId = token.CvDocumentId,
             Email = token.Email,
+            Language = token.Language,
             Status = JobSearchStatus.Pending,
             Keywords = keywords,
             ProviderConfigJson = providerConfigJson,