🔧 [chore] Replace pre-commit with ruff for linting workflow

- Update CI workflow to use ruff instead of pre-commit
- Remove E999 from ruff ignore rules in pyproject.toml

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/python-lint.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pre-commit
+          pip install ruff
 
-      - name: Run pre-commit
-        run: pre-commit run --all-files
+      - name: Run ruff
+        run: ruff check .