Auto-set CreatedAt/UpdatedAt via EF interceptor; standardize timestamp names across entities

Domain/Abstractions/IAuditable.cs

@@ -0,0 +1,9 @@
+namespace Musify.Domain.Abstractions
+{
+    public interface IAuditable
+    {
+        DateTime CreatedAt { get; set; }
+
+        DateTime UpdatedAt { get; set; }
+    }
+}

Domain/Entities/PlayList.cs

@@ -1,13 +1,14 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
+using Musify.Domain.Abstractions;
 using Musify.Domain.ValueObjects;
 
 namespace Musify.Domain.Entities
 {
 #pragma warning disable CS8618
     [Table("PlayLists")]
-    public class PlayList
+    public class PlayList : IAuditable
     {
         [Key]
         public Guid Id { get; set; } = Guid.NewGuid();
@@ -47,10 +48,10 @@ namespace Musify.Domain.Entities
         public LifeCycleStatus LifeCycleStatus { get; set; } = LifeCycleStatus.Active;
 
         [Required]
-        public DateTime CreatedDate { get; set; } = DateTime.UtcNow;
+        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
 
         [Required]
-        public DateTime UpdatedDate { get; set; } = DateTime.UtcNow;
+        public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
 
         [ForeignKey(nameof(UserId)) ]
         public User User { get; set; }

Domain/Entities/Track.cs

@@ -2,12 +2,13 @@
 using System.ComponentModel.DataAnnotations.Schema;
 using System.Diagnostics.CodeAnalysis;
 
+using Musify.Domain.Abstractions;
 using Musify.Domain.ValueObjects;
 
 namespace Musify.Domain.Entities
 {
 #pragma warning disable CS8618
-    public class Track
+    public class Track : IAuditable
     {
         [Key]
         public Guid Id { get; set; } = Guid.NewGuid();
@@ -55,10 +56,10 @@ namespace Musify.Domain.Entities
         public DateTime? LastRetryAt { get; set; }
 
         [Required]
-        public DateTime CreatedDate { get; set; } = DateTime.UtcNow;
+        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
 
         [Required]
-        public DateTime UpdatedDate { get; set; } = DateTime.UtcNow;
+        public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
 
         public ICollection<UserHasTrack> UserTracks { get; set; } = new List<UserHasTrack>();
 

Domain/Entities/User.cs

@@ -1,10 +1,11 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
+using Musify.Domain.Abstractions;
 
 namespace Musify.Domain.Entities
 {
     [Table("User")]
-    public class User
+    public class User : IAuditable
     {
         [Key]
         [DatabaseGenerated(DatabaseGeneratedOption.None)]