chore(simulation): update tests and fixtures for Sprint 23

- 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>

server/Cargo.lock

@@ -1092,7 +1092,7 @@ dependencies = [
 
 [[package]]
 name = "settled-reach-server"
-version = "0.1.20"
+version = "0.1.22"
 dependencies = [
  "bevy_app",
  "bevy_ecs",