[fix] apps names

backend/project/api/core/apps.py

@@ -3,4 +3,4 @@ from django.apps import AppConfig
 
 class CoreConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
-    name = "core"
+    name = "api.core"

backend/project/api/notifications/apps.py

@@ -3,4 +3,4 @@ from django.apps import AppConfig
 
 class NotificationsConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
-    name = "notifications"
+    name = "api.notifications"

backend/project/api/teams/apps.py

@@ -3,4 +3,4 @@ from django.apps import AppConfig
 
 class TeamsConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
-    name = "teams"
+    name = "api.teams"