[CHANGE] Remove anon accounts && added simple caching for urls

Manager.App/Services/System/ClientService.cs

@@ -10,7 +10,7 @@ namespace Manager.App.Services.System;
 public class ClientService(IServiceScopeFactory scopeFactory, ILogger<ClientService> logger)
     : ExtendedBackgroundService(nameof(ClientService), "Managing YouTube clients", logger, TimeSpan.FromMinutes(10))
 {
-    private readonly List<YouTubeClient> _clients = [];
+    private readonly List<YouTubeClient> _loadedClients = [];
     private CancellationToken _cancellationToken;
     private ILibraryService? _libraryService;