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

DeepDrftData/TrackConverter.cs

@@ -19,6 +19,7 @@ public class TrackConverter : IEntityToModelConverter<TrackEntity, TrackDto>
     public static ReleaseDto Convert(ReleaseEntity entity) => new()
     {
         Id = entity.Id,
+        EntryKey = entity.EntryKey,
         CreatedAt = entity.CreatedAt,
         UpdatedAt = entity.UpdatedAt,
         Title = entity.Title,
@@ -51,6 +52,10 @@ public class TrackConverter : IEntityToModelConverter<TrackEntity, TrackDto>
     public static ReleaseEntity Convert(ReleaseDto dto) => new()
     {
         Id = dto.Id,
+        // Round-trips the public handle. On the create path (FindOrCreateRelease) the DTO carries no
+        // EntryKey yet, so that path overrides this with a freshly minted GUID — the same shape as the
+        // natural-key (Title/Artist) override there.
+        EntryKey = dto.EntryKey,
         CreatedAt = dto.CreatedAt,
         UpdatedAt = dto.UpdatedAt,
         Title = dto.Title,