Serve polls the master over UART and pushes live state via WebSocket;
reopens the serial port when the device is unplugged and comes back.
Co-authored-by: Cursor <cursoragent@cursor.com>
JSON configs describe network and node MACs; scenarios run command
sequences with expect checks. Share UART client API across CLI and tests.
Co-authored-by: Cursor <cursoragent@cursor.com>
