Returns the current (or final) statistics for the specified
scorecard.
This works for both open and already-closed scorecards, making it
useful for polling progress or fetching archived results.
Identifier returned by /scorecard/open.
scorecard found; summary returned.
Aggregate results for an entire scorecard run.
Includes cumulative counters, optional metadata echoed back from
the open request, the API key that authenticated the run, and a
per-game breakdown in cards
.