fixed widget background refresh loading custom events from the legacy backend

lib/background/widget_background_task.dart

@@ -6,6 +6,7 @@ import 'package:flutter/widgets.dart';
 import 'package:workmanager/workmanager.dart';
 
 import '../api/marianumconnect/marianumconnect_endpoint.dart';
+import '../api/marianumconnect/queries/timetable_custom_events/timetable_custom_events_get.dart';
 import '../api/marianumconnect/queries/timetable_get_holidays/timetable_get_holidays.dart';
 import '../api/marianumconnect/queries/timetable_get_holidays/timetable_get_holidays_response.dart';
 import '../api/marianumconnect/queries/timetable_get_rooms/timetable_get_rooms.dart';
@@ -15,8 +16,6 @@ import '../api/marianumconnect/queries/timetable_get_subjects/timetable_get_subj
 import '../api/marianumconnect/queries/timetable_get_timegrid/timetable_get_timegrid.dart';
 import '../api/marianumconnect/queries/timetable_get_timegrid/timetable_get_timegrid_response.dart';
 import '../api/marianumconnect/queries/timetable_get_week/timetable_get_week.dart';
-import '../api/mhsl/custom_timetable_event/get/get_custom_timetable_event.dart';
-import '../api/mhsl/custom_timetable_event/get/get_custom_timetable_event_params.dart';
 import '../api/mhsl/custom_timetable_event/get/get_custom_timetable_event_response.dart';
 import '../session/session.dart';
 import '../session/session_manager.dart';
@@ -106,7 +105,7 @@ class WidgetBackgroundTask {
       log('[widget-refresh] snapshot is fresh, skipping refresh');
       return;
     }
-    await _refresh(session);
+    await _refresh();
   }
 
   static Future<void> cancelAll() async {
@@ -143,7 +142,7 @@ void _callbackDispatcher() {
   });
 }
 
-Future<void> _refresh(Session session) async {
+Future<void> _refresh() async {
   await WidgetSync.ensureInitialized();
   // The background isolate doesn't go through main.dart's BlocBuilder, so we
   // re-apply the endpoint the foreground last persisted. Without this the
@@ -182,14 +181,9 @@ Future<void> _refresh(Session session) async {
   final timegridFuture = _runOrNull<TimetableGetTimegridResponse>(
     () => TimetableGetTimegrid().run(),
   );
-  final customEventsFuture = switch (session) {
-    CredentialSession(:final legacyUserSecret) =>
-      _runOrNull<GetCustomTimetableEventResponse>(
-        () => GetCustomTimetableEvent(
-          GetCustomTimetableEventParams(legacyUserSecret),
-        ).run(),
-      ),
-  };
+  final customEventsFuture = _runOrNull<GetCustomTimetableEventResponse>(
+    () => TimetableCustomEventsGet().run(),
+  );
   final timetable = await timetableFuture;
   final subjects = await subjectsFuture;
   final rooms = await roomsFuture;