refactor: 更改系统消息初始化策略

apps/ops/notifications.py

@@ -3,6 +3,7 @@ from django.utils.translation import gettext_lazy as _
 from notifications.notifications import SystemMessage
 from notifications.models import SystemMsgSubscription
 from users.models import User
+from notifications.backends import BACKEND
 
 __all__ = ('ServerPerformanceMessage',)
 
@@ -24,3 +25,5 @@ class ServerPerformanceMessage(SystemMessage):
     def post_insert_to_db(cls, subscription: SystemMsgSubscription):
         admins = User.objects.filter(role=User.ROLE.ADMIN)
         subscription.users.add(*admins)
+        subscription.receive_backends = [BACKEND.EMAIL]
+        subscription.save()