message: add set last traj in behavior action store
diff: @@ -28,6 +28,7 @@ ActionHash BehaviorActionStore::Store(const Action& action, const Trajectory& tr
  Trajectory BehaviorActionStore::Retrieve(const ActionHash& action_hash) const {
  auto it = trajectory_store_.find(action_hash);
  BARK_EXPECT_TRUE(it != trajectory_store_.end());
  + SetLastTrajectory(it->second);
  return it->second;
  }
  