CI fix 13

Author: Max Azatian

.github/workflows/tests.yml

@@ -139,9 +139,12 @@ jobs:
       - name: Run backend tests with coverage
         env:
           BACKEND_BASE_URL: https://127.0.0.1:443
+          # Provide an explicit Mongo URI for tests using the CI secrets and modern auth mechanism
+          MONGODB_URL: mongodb://${{ secrets.MONGO_ROOT_USER }}:${{ secrets.MONGO_ROOT_PASSWORD }}@127.0.0.1:27017/?authSource=admin&authMechanism=SCRAM-SHA-256
         run: |
           cd backend
           echo "Using BACKEND_BASE_URL=$BACKEND_BASE_URL"
+          # Do not echo the full MONGODB_URL to avoid leaking secrets
           python -m pytest tests/integration tests/unit -v --cov=app --cov-branch --cov-report=xml --cov-report=term --cov-report=term-missing
 
       - name: Upload coverage to Codecov