Resolved startup errors:
1. Type hint compatibility:
- Changed SkaterStatsDTO | GoalieStatsDTO to Union[SkaterStatsDTO, GoalieStatsDTO]
- Python 3.9 does not support | operator for type unions
2. Yahoo Fantasy adapter import:
- Made yfpy import lazy in get_fantasy_repository()
- Prevents ModuleNotFoundError when yfpy not installed
- Only loads Yahoo adapter when actually needed
3. Updated startup script for compatibility
The application now starts successfully on Python 3.9.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
