Changes

Summary

1. fix: offset stamp error. (details)
2. fix: offset and masked_box serialization. (details)

Commit 6d7cf2b7465a953b13c2659fee80a31d6265827a by 5081703.cr fix: offset stamp error.
	source/ros_source_offset.cpp
Commit 3b2b69c3fbcc34d50bd4e65bd84c3157f4136f6f by 5081703.cr fix: offset and masked_box serialization.
	data/plan_frame.hpp
	data/plan_frame.cpp
	data/vehicle/related_offset.hpp
	data/vehicle/related_offset.cpp