feat(release): front int PK with app-minted GUID EntryKey on the public addressing surface (P11 W5, 11.H)

DeepDrftData/Repositories/ReleaseRepository.cs

@@ -95,6 +95,16 @@ public class ReleaseRepository
             .Include(r => r.MixMetadata)
             .FirstOrDefaultAsync(ct);
 
+    // The public addressing read: resolve a release by its opaque EntryKey (Phase 11 §3e). Mirrors
+    // GetByIdWithMetadataAsync but keys on the unique entry_key column — the int PK never reaches the
+    // public surface. The resolved entity still carries its int Id for internal joins (track page).
+    public async Task<ReleaseEntity?> GetByEntryKeyWithMetadataAsync(string entryKey, CancellationToken ct)
+        => await _context.Releases
+            .Where(r => r.EntryKey == entryKey && !r.IsDeleted)
+            .Include(r => r.SessionMetadata)
+            .Include(r => r.MixMetadata)
+            .FirstOrDefaultAsync(ct);
+
     // Non-deleted track counts for a specific set of releases, for populating ReleaseDto.TrackCount on
     // list reads without an N+1 fan-out. Releases with zero live tracks are absent from the dictionary.
     public async Task<Dictionary<long, int>> GetTrackCountsByReleaseIdsAsync(