- Replace hardcoded absolute paths with relative paths using Path(__file__).parent
- Update test_activity_flows.py, test_guarded_ai.py, and test_battleship_pre_script.py to use dynamic path construction
- Import yaml module and catch yaml.YAMLError instead of broad Exception in test_activity_processing.py
- Ensures tests work across different environments and CI systems
- Makes YAML error handling more specific and prevents masking other exceptions