Filter BMA456 logs by configurable LSB threshold; master can set deadzone
for local sensor or slaves using ACCEL_DEADZONE (UART) and ESP-NOW broadcast
until unicast delivery is restored.
Co-authored-by: Cursor <cursoragent@cursor.com>
Refactor into version/clients subcommands with shared serial framing
to list registered slaves from the master over UART.
Co-authored-by: Cursor <cursoragent@cursor.com>
