start method
Implementation
Future<void> start() async {
if (_isRunning) {
return;
}
_isRunning = true;
_stopController = StreamController<void>.broadcast(); // broadcast if multiple listeners, otherwise regular
_backgroundCompleter = Completer<void>();
// log.debug('AutoRelay starting'); // TODO: Add logging
// Start the background process
_background(_stopController!.stream);
// Consider initial status check if needed, though background loop will catch first event.
// Also, trigger an initial address update.
_updateAndEmitAdvertisableAddrs();
}