Travel constraint validation was not working because ItineraryConstraints
had no game items to validate against - games came from RichGame objects
but were never converted to ItineraryItem for constraint checking.
Changes:
- Add city parameter to ItemKind.game enum case
- Create game ItineraryItems from RichGame data in buildItineraryData()
- Update isValidTravelPosition to compare against actual game sortOrders
- Fix tests to use appropriate game sortOrder conventions
Now travel is properly constrained to appear before arrival city games
and after departure city games.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>