fix: UserRole enum case mismatch with PostgreSQL (OWNER→owner)

backend/app/models/user.py

@@ -9,9 +9,9 @@ from app.database import Base
 
 
 class UserRole(str, enum.Enum):
-    OWNER = "owner"
-    OPERATOR = "operator"
-    VIEWER = "viewer"
+    owner = "owner"
+    operator = "operator"
+    viewer = "viewer"
 
 
 class User(Base):
@@ -21,7 +21,7 @@ class User(Base):
     username: Mapped[str] = mapped_column(String(50), unique=True, nullable=False, index=True)
     email: Mapped[str] = mapped_column(String(255), unique=True, nullable=False)
     hashed_password: Mapped[str] = mapped_column(String(255), nullable=False)
-    role: Mapped[UserRole] = mapped_column(SAEnum(UserRole), default=UserRole.VIEWER, nullable=False)
+    role: Mapped[UserRole] = mapped_column(SAEnum(UserRole), default=UserRole.viewer, nullable=False)
     is_active: Mapped[bool] = mapped_column(Boolean, default=True)
     is_approved: Mapped[bool] = mapped_column(Boolean, default=False)
     login_attempts: Mapped[int] = mapped_column(default=0)

backend/app/services/auth_service.py

@@ -77,10 +77,10 @@ async def create_user(db: AsyncSession, username: str, email: str, password: str
     existing_count = len(result.scalars().all())
 
     if existing_count == 0:
-        role = UserRole.OWNER
+        role = UserRole.owner
         is_approved = True
     else:
-        role = UserRole.VIEWER
+        role = UserRole.viewer
         is_approved = False
 
     user = User(