fix(ops): 修复任务schedule属性的bug

apps/ops/mixin.py

@@ -95,10 +95,8 @@ class PeriodTaskModelMixin(models.Model):
     @property
     def schedule(self):
         from django_celery_beat.models import PeriodicTask
-        try:
-            return PeriodicTask.objects.get(name=str(self))
-        except PeriodicTask.DoesNotExist:
-            return None
+        name = self.get_register_task()[0]
+        return PeriodicTask.objects.filter(name=name).first()
 
     class Meta:
         abstract = True