Function maybe_trigger_rollout 

async fn maybe_trigger_rollout(
    client: &Client,
    config: &Config,
    last_triggered: &mut BTreeMap<(String, String), Instant>,
    namespace: &str,
    name: &str,
    nodes: &BTreeSet<String>,
) -> Result<(), Error>

Triggers a forced rollout of the given Materialize instance, unless one is already in progress or was triggered very recently.