Check the absence of stack traces in log after API tests

Author: c8y3

.github/workflows/ci.yml

@@ -183,10 +183,9 @@ jobs:
           source venv/bin/activate
           pip install -r requirements.txt
           PYTHONUNBUFFERED=true python -m unittest --verbose
-# TODO: put back, once all existing traces are figured out
-#      - name: Check the absence of errors/stack traces in logs
-#        run: |
-#          docker compose logs app | grep Traceback -A100 && exit 1
+      - name: Check the absence of errors/stack traces in logs
+        run: |
+          docker compose logs app | grep Traceback -A100 && exit 1
       - name: Stop development server
         if: ${{ always() }}
         run: |