closeAllConnectionsForRelay method
Close all connections for a relay.
Implementation
Future<void> closeAllConnectionsForRelay(String relayUrl) async {
final connections = _connectionPools[relayUrl] ?? [];
// Future: Add WebSocket close logic if needed
connections.clear();
_connectionPools[relayUrl] = [];
_availableConnections[relayUrl] = [];
logger.log('All connections closed for relay: $relayUrl');
}