Move some constants to common (#11004)

### What problem does this PR solve?

As title.

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

api/apps/__init__.py

@@ -24,7 +24,7 @@ from flask_cors import CORS
 from flasgger import Swagger
 from itsdangerous.url_safe import URLSafeTimedSerializer as Serializer
 
-from api.db import StatusEnum
+from common.constants import StatusEnum
 from api.db.db_models import close_connection
 from api.db.services import UserService
 from api.utils.json_encode import CustomJSONEncoder