isStaggeredCronRunAtMs probed the cron library at runAtMs + 1 to decide
whether a persisted nextRunAtMs was a real schedule slot. Croner-style
second-granular schedules normalize that 1ms probe back to the candidate
second, so previousRuns(1, runAtMs + 1) returns the slot before the
candidate instead of the candidate itself. shouldRepairFutureCronNextRunAtMs
then classified valid exact-second slots two-plus intervals out as stale
and rebased them.
Probe at runAtMs + 1_000 instead so the previous-run lookup lands past the
candidate second, matching the +1s cursor step used elsewhere in this file.
Fixes#81691
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
e99f254f1c