Backport pull request #15899 from jellyfin/release-10.11.z

Fix watched state not kept on Media replace/rename

Original-merge: 8433b6d8a4

Merged-by: joshuaboniface <joshua@boniface.me>

Backported-by: Bond_009 <bond.009@outlook.com>

MediaBrowser.Controller/Library/ILibraryManager.cs

@@ -281,6 +281,14 @@ namespace MediaBrowser.Controller.Library
         /// <returns>Returns a Task that can be awaited.</returns>
         Task UpdateItemAsync(BaseItem item, BaseItem parent, ItemUpdateType updateReason, CancellationToken cancellationToken);
 
+        /// <summary>
+        /// Reattaches the user data to the item.
+        /// </summary>
+        /// <param name="item">The item.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>A task that represents the asynchronous reattachment operation.</returns>
+        Task ReattachUserDataAsync(BaseItem item, CancellationToken cancellationToken);
+
         /// <summary>
         /// Retrieves the item.
         /// </summary>