Function probe

pub(crate) async fn probe(
    interval: Duration,
    local_node: NodeAddr,
    endpoint_ipaddr: IpAddr,
    target_uri: String,
    fqdn: String,
    chan_outbox_tx: Sender<QuorumMsg>,
    cancel_probe: CancellationToken,
)

Runs an HTTP[S] probe. Sends datapoints into chan_outbox_tx