The test gave LedgerSeries records dated 2026-10-06 14:30 UTC while
LedgerSeries reads today from time.Now(), so it passed only on 2026-10-06
and has failed on every machine since ("part: {Calls:0 ...}" just after
midnight CST on 10-07). The summary and row checks keep the fixed date;
the rows given to LedgerSeries take the clock's. go test -race
./internal/usage passes; gofmt and vet are clean.