pub fn flat_metrics_dump(metrics: &PayloadMetrics) -> Vec<(&str, f64)>Expand description
Flatten the full (name, value) pair list for diagnostic
rendering inside error messages. Returned as an owned
Vec<(&str, f64)> so call sites spell the diagnostic as a single
{:?} formatter argument instead of re-typing the
.iter().map(...).collect() chain at every site.
Intended for “probe returned nothing we expected” error paths —
when a lookup helper (lookup_thread, snapshot_worker_allocated,
find_metric_u64) returns a miss, dumping the observed flat metric
list into the failure message is usually the fastest triage step.