fix: add migrations for stored procedure and privacy field in playlists

Entities/Playlist.cs

@@ -6,6 +6,7 @@ public class Playlist
 	required public string Uri { get; set; }
 	required public string Description { get; set; }
 	required public int CreatorId { get; set; } // UserId?
+	required public bool Private { get; set; } = true;
 
 	required public User Creator { get; set; }
 	public List<PlaylistUser> AuthorizedPlaylistUsers { get; set; } = [];