completed

- Modified _monitor_game_state to create new matches from old completed ones instead of stopping when fixture completes
- Enhanced _initialize_new_fixture to create fixtures from old matches when no new fixtures available
- Added helper methods for match selection and recycling:
  * _select_random_completed_matches(): Selects random completed matches
  * _create_matches_from_old_matches(): Creates new matches in existing fixture
  * _create_new_fixture_from_old_matches(): Creates new fixture from recycled matches
- Added comprehensive documentation explaining game flow and human intervention points
- Game now runs continuously until machine restart, recycling completed matches to maintain betting opportunities