Add autofix workflow for Python code

Introduces a GitHub Actions workflow that runs on pushes to main and manual dispatch. The workflow syncs dependencies with uv, runs ruff for linting and formatting, and commits any fixes automatically.

.github/workflows/autofix.yml

@@ -0,0 +1,64 @@
+name: Autofix (uv sync, ruff check & format)
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'pyproject.toml'
+      - '**/*.py'
+  workflow_dispatch:
+
+jobs:
+  autofix:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v3
+
+      - name: Sync dependencies and update uv.lock
+        run: uv sync
+
+      - name: Install ruff
+        run: uv pip install ruff
+
+      - name: Run ruff check with fixes
+        run: ruff check --fix .
+        continue-on-error: true
+
+      - name: Run ruff format
+        run: ruff format .
+
+      - name: Check for changes
+        id: changes
+        run: |
+          if git diff --quiet; then
+            echo "changed=false" >> $GITHUB_OUTPUT
+            echo "No changes detected"
+          else
+            echo "changed=true" >> $GITHUB_OUTPUT
+            echo "Changes detected:"
+            git diff --stat
+          fi
+
+      - name: Commit and push changes
+        if: steps.changes.outputs.changed == 'true'
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git add -A
+          git commit -m "chore: autofix - uv sync, ruff check & format [skip ci]"
+          git push
+