Function mz_environmentd::http::sql::handle_promsql_query

async fn handle_promsql_query(
    client: &mut AuthedClient,
    query: &PrometheusSqlQuery<'_>,
    metrics_registry: &MetricsRegistry,
    metrics_by_name: &mut BTreeMap<String, GenericGaugeVec<AtomicF64>>,
)