Add _handle_reset() and _make_setup_screen() to main.py; integrate ButtonHoldDetector
and LEDController into the radar loop; LED lights immediately on hold, config is wiped,
setup screen shown, then os.execvp hands off to planemapper-provision. Wipe failures
log ERROR and abort without exec. Completes epic-4.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>