Clean up domain entities: shared picture value object, lifecycle and ownership interfaces, explicit tables

backend/Core/Musify.Domain/Entities/AlbumHasTrack.cs

@@ -1,29 +1,23 @@
-using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Musify.Domain.Entities;
 
-#pragma warning disable CS8618
 [Table("AlbumHasTrack")]
 public class AlbumHasTrack
 {
     public Guid Id { get; set; } = Guid.NewGuid();
 
-    [Required]
     public required Guid AlbumId { get; set; }
 
-    [Required]
     public required Guid TrackId { get; set; }
 
-    [Required]
     public int TrackNumber { get; set; } = 1;
 
-    [Required]
     public DateTime AddedAt { get; set; } = DateTime.UtcNow;
 
     [ForeignKey(nameof(AlbumId))]
-    public Album Album { get; set; }
+    public Album Album { get; set; } = null!;
 
     [ForeignKey(nameof(TrackId))]
-    public Track Track { get; set; }
+    public Track Track { get; set; } = null!;
 }