consolidate OpenAPI categories and deprecate startup routes

Jellyfin.Api/Controllers/ItemRefreshController.cs

@@ -20,6 +20,7 @@ namespace Jellyfin.Api.Controllers;
 /// </summary>
 [Route("Items")]
 [Authorize(Policy = Policies.RequiresElevation)]
+[Tags("Library")]
 public class ItemRefreshController : BaseJellyfinApiController
 {
     private readonly ILibraryManager _libraryManager;