feat: normalize release-cardinal fields out of track into a Release entity (Phase 8 §8.0)

DeepDrftModels/DTOs/TrackDto.cs

@@ -1,4 +1,3 @@
-using DeepDrftModels.Enums;
 using Models.Models;
 
 namespace DeepDrftModels.DTOs;
@@ -6,20 +5,17 @@ namespace DeepDrftModels.DTOs;
 // Inherits Id, CreatedAt, UpdatedAt from BaseModel (Cerebellum.BlazorBlocks.Models).
 // BlazorBlocks's Manager<> generic constraint requires `new()` on the model type, which
 // disqualifies `required` properties (the `new()` constraint and required members do not
-// compose). EntryKey/TrackName/Artist therefore drop `required` here — the TrackEntity
-// side remains required, and TrackConverter assigns every field on the round-trip so an
-// empty default is never observable in production code paths.
+// compose). EntryKey/TrackName therefore drop `required` here — the TrackEntity side remains
+// required, and TrackConverter assigns every field on the round-trip so an empty default is
+// never observable in production code paths.
+//
+// Track-cardinal data only (Phase 8 §8.0). Release-cardinal fields are read via Release?.X.
 public class TrackDto : BaseModel
 {
     public string EntryKey { get; set; } = string.Empty;
     public string TrackName { get; set; } = string.Empty;
-    public string Artist { get; set; } = string.Empty;
-    public string? Album { get; set; }
-    public string? Genre { get; set; }
-    public DateOnly? ReleaseDate { get; set; }
-    public string? ImagePath { get; set; }
-    public long? CreatedByUserId { get; set; }
     public string? OriginalFileName { get; set; }
-    public ReleaseType ReleaseType { get; set; } = ReleaseType.Single;
     public int TrackNumber { get; set; } = 1;
+    public long? ReleaseId { get; set; }
+    public ReleaseDto? Release { get; set; }
 }