Move CV matcher repositories from cv-matcher-api to cv-matcher-data

- Move IAiPromptsRepository, EfAiPromptsRepository to cv-matcher-data/Repositories
- Move IMatcherRepository, EfMatcherRepository to cv-matcher-data/Repositories
- Add cv-matcher-api-models ProjectReference to cv-matcher-data.csproj
- Delete cv-matcher-api/Data folder (all data access now in cv-matcher-data)

Pattern: cv-matcher-api (logic) → cv-matcher-data (repositories, EF entities, migrations)
Aligns with rag-api → rag-data consolidation

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

Apis/cv-matcher-data/Repositories/Contracts/IAiPromptsRepository.cs

@@ -0,0 +1,6 @@
+namespace CvMatcher.Data.Repositories.Contracts;
+
+public interface IAiPromptsRepository
+{
+    Task<string?> GetAsync(string key, string language, CancellationToken ct);
+}