Expanded BaseItem aggregate types

Jellyfin.Data/Entities/BaseItemMetadataField.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+
+namespace Jellyfin.Data.Entities;
+#pragma warning disable CA2227
+
+/// <summary>
+/// Enum MetadataFields.
+/// </summary>
+public class BaseItemMetadataField
+{
+    /// <summary>
+    /// Gets or Sets Numerical ID of this enumeratable.
+    /// </summary>
+    public required int Id { get; set; }
+
+    /// <summary>
+    /// Gets or Sets all referenced <see cref="BaseItemEntity"/>.
+    /// </summary>
+    public required Guid ItemId { get; set; }
+
+    /// <summary>
+    /// Gets or Sets all referenced <see cref="BaseItemEntity"/>.
+    /// </summary>
+    public required BaseItemEntity Item { get; set; }
+}