Handle permissions (and it seems working!)

apps/permission/apps.py

@@ -2,7 +2,14 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from django.apps import AppConfig
+from django.db.models.signals import pre_save, pre_delete
 
 
 class PermissionConfig(AppConfig):
     name = 'permission'
+
+    def ready(self):
+        # noinspection PyUnresolvedReferences
+        from . import signals
+        pre_save.connect(signals.pre_save_object)
+        pre_delete.connect(signals.pre_delete_object)