chore: no sync for backend/unit tests

Author: HardMax71

.github/workflows/stack-tests.yml

@@ -58,7 +58,7 @@ jobs:
         timeout-minutes: 5
         run: |
           cd backend
-          uv run pytest tests/unit -v -rs \
+          uv run --no-sync pytest tests/unit -v -rs \
             --durations=0 \
             --cov=app \
             --cov-report=xml --cov-report=term