add pandoc (and retry parallel)

Author: kkappler

.github/workflows/tests.yaml

@@ -63,10 +63,15 @@ jobs:
           uv pip install jupyter nbconvert nbformat ipykernel pytest pytest-cov pytest-timeout codecov
           python -m ipykernel install --user --name "python3"
 
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y pandoc
+
       - name: Run Tests
         run: |
           source .venv/bin/activate
-          pytest -s -v --cov=./ --cov-report=xml --cov=aurora tests
+          pytest -s -v --cov=./ --cov-report=xml --cov=aurora -n auto tests
           
       - name: "Upload coverage reports to Codecov"
         uses: codecov/codecov-action@v4