- Fix black formatting issues in test_api.py and test_linting.py
- Add comprehensive linting test suite (test_linting.py) with:
- Black formatting checks (fails early if code needs formatting)
- isort import sorting checks
- flake8 linting checks
- mypy type checking (with Windows skip for CI stability)
- Project structure validation
- Debug statement detection (catches pdb, breakpoint, DEBUG prints)
- All 47 tests now passing with 92% coverage
- Linting issues caught early in local test runs
- Provides clear error messages with fix instructions