改用mysql

backend/app/repositories/user_repo.py

@@ -46,12 +46,14 @@ class UserRepository:
         email: str,
         password_hash: str,
         plan_id: str,
+        role: str = "customer",
     ) -> User:
         user = User(
             username=username,
             email=email.lower(),
             password_hash=password_hash,
             status="active",
+            role=role,
             plan_id=plan_id,
             storage_used=0,
         )