- Add debug_response: None to all ObserverSnapshot constructors in
integration tests
- Bump PROTOCOL_VERSION assertion 17 → 18 in serialization tests
- Regenerate golden proof_room_tick_10.json (BoundaryWall tiles)
- Regenerate client msgpack fixtures for new snapshot fields
- Fix debug.rs resource optionality (Option<ResMut> for
ContaminationActive/EventQueue)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>