[Scheduler] Fix remaining count for triggers expired on creation

cronback-services/src/scheduler/spinner/active_triggers.rs

@@ -345,13 +345,13 @@ pub(crate) struct ActiveTrigger {
 
 impl ActiveTrigger {
  fn try_from(
- trigger: Trigger,
+ mut trigger: Trigger,
  fast_forward: bool,
  ) -> Result<Self, TriggerError> {
  // Do we have a cron pattern or a set of time points?
  let k = trigger
  .schedule
- .as_ref()
+ .as_mut()
  .ok_or_else(|| TriggerError::NotScheduled(trigger.id.clone()))?;
  // On fast forward, we ignore the last run time.
  let last_ran_at = if fast_forward {
@@ -360,6 +360,12 @@ impl ActiveTrigger {
  trigger.last_ran_at
  };
  let ticks = ScheduleIter::from_schedule(k, last_ran_at)?;
+
+ // RunAt triggers in particular might have expired timepoints that will
+ // be skipped. Update the underlying trigger so that the
+ // "remaining" attribute correctly reflects that.
+ k.set_remaining(ticks.remaining());
+
  // We assume that Trigger.schedule is never None
  Ok(Self {
  inner: trigger,