Fix formatting with black

.gitlab-ci.yml

@@ -33,11 +33,11 @@ lint:
     - pip install pre-commit black flake8
     # Run pre-commit hooks
     - >
-      pre-commit run --all-files || (
+      pre-commit run --all-files || { 
       echo "Pre-commit formatting failed. Auto-fixing formatting issues with black..." &&
       black backend/ &&
-      exit 1  # If files needed formatting, fail the job. Developer needs to review changes locally.
-      )
+      exit 1; 
+      }
 
 deploy:
   stage: deploy