Fix cron handler signature: remove event parameter from cron step

- Fix calendar_sync_cron_step.py handler signature from (event, context) to (context)
- Cron steps only receive context parameter, not event

bitbylaw/steps/advoware_cal_sync/calendar_sync_cron_step.py

@@ -12,7 +12,7 @@ config = {
     'emits': ['calendar.sync.triggered']
 }
 
-async def handler(event, context):
+async def handler(context):
     try:
         # Prüfe ob bereits ein Sync läuft
         redis_client = redis.Redis(