feat: work on implementing UoW pattern

src/SanctionsSearch.Worker/Persistence/EfUnitOfWork.cs

@@ -0,0 +1,17 @@
+namespace SanctionsSearch.Worker.Persistence;
+
+class EfUnitOfWork(AppDbContext context, ILoggerFactory loggerFactory) : IUnitOfWork, IAsyncDisposable
+{
+  private readonly AppDbContext _context = context;
+  public ISdnRepository Sdns { get; } = new SdnRepository(context, loggerFactory.CreateLogger<SdnRepository>());
+
+  public async Task SaveChangesAsync()
+  {
+    await _context.SaveChangesAsync();
+  }
+
+  public async ValueTask DisposeAsync()
+  {
+    await _context.DisposeAsync();
+  }
+}