Function try_dispatch 

pub async fn try_dispatch(
    run_id: RunId,
    step_instance_id: StepInstanceId,
    step_type: &str,
    resolved_spec: &Value,
    pool: PgPool,
    nats_client: Client,
    _tls_reloader: Arc<TlsReloader>,
) -> Result<bool>

Attempts to dispatch an AWS Lambda execution step instance.