Complete LOW-001: Verify comprehensive docstring coverage
Audit of all 14 core module files confirms they already have
comprehensive Google-style documentation:
- Module docstrings with usage examples
- Class docstrings with Attributes sections
- Method/function docstrings with Args, Returns, Raises
Files verified:
- enums.py, config.py, rng.py
- models/card.py, models/actions.py, models/game_state.py
- effects/base.py, effects/registry.py, effects/handlers.py
- rules_validator.py, turn_manager.py, win_conditions.py
- visibility.py, engine.py
PROJECT_PLAN.json: 32/32 tasks complete - game engine scaffolding done!
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