[ci] tro to execute pytest in a venv

.woodpecker/workflow.yaml

@@ -22,8 +22,11 @@ steps:
       - markdownlint-cli2 .
 
   # currently doesn't work and bronsen can't be arsed to fix
-  # - name: Run Tests
-  #   image: docker.io/astral/uv:python${PYTHON_VERSION}-trixie-slim
-  #   commands:
-  #     - uv run pytest tests.py
-  #     coverage: uv run pytest tests.py --cov-report= --cov=src # no cov report on terminal: useful for CI
+  - name: Run Tests
+    image: docker.io/astral/uv:python${PYTHON_VERSION}-trixie-slim
+    commands:
+      - python -m venv venv
+      - source venv/bin/activate
+      - python -m pip install -r requirements.txt -r requirements.dev.txt
+      - python -m pytest tests.py
+      # coverage: uv run pytest tests.py --cov-report= --cov=src # no cov report on terminal: useful for CI