Add ruff. Use ruff lint (not format) in github workflow. Tests OK 41 of

.github/workflows/python-app.yml

@@ -26,12 +26,12 @@ jobs:
     - name: Install the project
       run: uv sync --locked --all-extras --dev
 
-    - name: Lint with flake8
+    - name: Lint with ruff
       run: |
         ## stop the build if there are Python syntax errors or undefined names
         #flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        uv run flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        uv run ruff check src
 
     - name: Run tests
       run: uv run pytest tests

pyproject.toml

@@ -23,5 +23,6 @@ dev = [
     "pytest>=8.2.0",
     "pytest-cov>=7.0.0",
     "pytest-mock>=3.15.1",
+    "ruff>=0.15.1",
     "types-pyyaml>=6.0.12.20250915",
 ]