Refactor auth service to improve refresh token revocation handling and logging

app/services/auth.py

@@ -231,11 +231,17 @@ class AuthService:
 
     async def revoke_refresh_token(self, user: User) -> None:
         """Revoke a user's refresh token."""
-        user.refresh_token_hash = None
-        user.refresh_token_expires_at = None
-        self.session.add(user)
-        await self.session.commit()
-        logger.info("Refresh token revoked for user: %s", user.email)
+        try:
+            # Use the repository to update the user to ensure proper session handling
+            update_data = {
+                "refresh_token_hash": None,
+                "refresh_token_expires_at": None,
+            }
+            await self.user_repo.update(user, update_data)
+            logger.info("Refresh token revoked for user: %s", user.email)
+        except Exception:
+            logger.exception("Failed to revoke refresh token for user: %s", user.email)
+            raise
 
     async def create_user_response(self, user: User) -> UserResponse:
         """Create a user response from a user model."""