FirmwareMaintenance

A USB firmware-maintenance sequence (factory erase).

A factory erase leaves the device enumerating as a bare CDC port with no Meshtastic protocol on it. The serial transport will happily bind to that — its device lookup falls back to whatever probed device it can find, not just the saved address — and the environmental-recovery listeners re-enter transport startup whenever Bluetooth or the network flips. Both would claim the port the maintenance flow needs.