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

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

@@ -3,25 +3,21 @@ using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Musify.Domain.Entities;
 
-#pragma warning disable CS8618
 [Table("UserFollows")]
 public class UserFollow
 {
     [Key]
     public Guid Id { get; set; } = Guid.NewGuid();
 
-    [Required]
     public required long FollowerId { get; set; }
 
-    [Required]
     public required long FollowedId { get; set; }
 
-    [Required]
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
 
     [ForeignKey(nameof(FollowerId))]
-    public User Follower { get; set; }
+    public User Follower { get; set; } = null!;
 
     [ForeignKey(nameof(FollowedId))]
-    public User Followed { get; set; }
+    public User Followed { get; set; } = null!;
 }