Implements items 4-5 of the whole-project review's suggested order
(docs/PROJECT_REVIEW_PLAN.md):
- Drop the three SaveJobs calls in the run lifecycle (startRunLocked,
executeRun, SetGlobalPause): none of them change a durable Job field,
everything they touch lives on JobRuntime, which is never persisted.
Retire TestStartRunLockedRollbackOnSaveFailure with the rollback it
guarded, since a run can no longer fail to start this way.
- Clear PendingRuns (the "queue" overlap policy's backlog) when a job is
disabled or the scheduler is globally paused, so resuming or
re-enabling a job no longer replays a deferred run left over from
before the pause/disable. Cap it at maxPendingRuns (10) so a job whose
runs take longer than its own interval stops accumulating an unbounded
backlog. Surface the queued count in the details pane via DisplayStats.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>