Refactor rankings action to use render_with_player helper for
consistent current_player availability across views.
Changes:
- Update rankings action to use render_with_player
- Ensure current_player is available in all view templates
- Implement EloCalculator service for 2v2 Euchre matches
- Create background job processing with GoodJob
- Add single match entry form
- Add CSV upload for batch match entry
- Create player rankings view
- Add database schema for matches and elo snapshots
david