fix: [merger] 修复pre_event实例方法问题

isc_video_record/merger.py

@@ -110,7 +110,7 @@ class EventMergerJob:
             camera['device_code'], last_check_time, now, len(alarm_list)))
 
         if dynaconf.settings.get('EVENT_ON', True):
-            events = PreEvent.merge_alarm_to_event(alarm_list)
+            events = pre_event.merge_alarm_to_event(alarm_list)
         else:
             events = [{
                 'start_time': last_check_time.astimezone(tz),