Function spawn_init_read_only 

pub fn spawn_init_read_only(
    config: Config,
    network: &Network,
) -> JoinHandle<(ReadStateService, ZebraDb, Sender<NonFinalizedState>)>

Calls init_read_only with the provided Config and Network from a blocking task. Returns a [tokio::task::JoinHandle] with a read state service and chain tip sender.