What the run cost. null while the vendor has not said, or when it never does.
The breakdown rather than the total: unsupported-type is a schema gap that is ours to close,
no-box is a vendor data problem, and "7 dropped" cannot tell them apart.
Wall time from submit to this answer, across every poll. null when the submit was not seen
by this process — see extendRunTelemetry, which keeps that clock in memory only.
Rung 2: Extend read the page. Everything here is a fact only a vendor run has.