fix(battery): copy vehicle status states at central place to avoid logic not executed due to previous read

[sfuhrer]

Solved Problem

Fixes #27011

Solution

• copy data from VehicleStatus.msg in central place
• add second class member to be able to catch moment of transition to FW

Changelog Entry

For release notes:

fix(battery): copy vehicle status states at central place to avoid logic not executed due to previous read

Test coverage

Tested in SITL (added printf for reset and simulated VTOL transition).