nostr:nprofile1qyshwumn8ghj7etcwpjkuumfwejj6un9d3shjtnxd9shg6npvchxxmmdqyxhwumn8ghj7mn0wvhxcmmvqqsvas5crnk69mpv5kd5zaugzatzf4rggflu5zm4fjgzd8dss9x57fs376lrf does the coinjoin coordination stay fully airgapped over qr, or does krux need a network path for the join?