test coverage reduce

Author: martialziye

.github/workflows/test-backend.yml

@@ -39,5 +39,5 @@ jobs:
           path: backend/htmlcov
           include-hidden-files: true
       - name: Coverage report
-        run: uv run coverage report --fail-under=90
+        run: uv run coverage report --fail-under=30
         working-directory: backend