refactor: modernize code quality tooling with Ruff

- Replace black, isort, and flake8 with Ruff (all-in-one linter and formatter)
- Add comprehensive pyproject.toml configuration
- Simplify Makefile code quality targets
- Configure exclusions for venv/.venv in pyproject.toml
- Auto-fix 1,359 linting issues across codebase

Benefits:
- Much faster builds (Ruff is written in Rust)
- Single tool replaces multiple tools
- More comprehensive rule set (UP, B, C4, SIM, PIE, RET, Q)
- All configuration centralized in pyproject.toml
- Better import sorting and formatting consistency

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

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

tests/unit/middleware/test_logging.py

@@ -134,8 +134,9 @@ class TestLoggingMiddleware:
 
         call_next = AsyncMock(side_effect=Exception("Test error"))
 
-        with patch("middleware.logging.logger") as mock_logger, pytest.raises(
-            Exception
+        with (
+            patch("middleware.logging.logger") as mock_logger,
+            pytest.raises(Exception),
         ):
             await middleware.dispatch(request, call_next)