Extended features/mocks/test_uow_factory.py with:
- use_test_uow(context) function to attach test UoW to Behave context with automatic cleanup
- cleanup_test_uow(context) function for teardown
- Comprehensive docstrings and examples
Updated features/environment.py:
- Added cleanup_test_uow() call in after_scenario hook
ISSUES CLOSED: #9541