The 15-min job-scheduler daemon and the systemd per-job timer both
dispatched auto-work-queue-f10 (timer at :27, scheduler at :30) because
the scheduler's dedup watermark only tracks its own fires. Setting
schedule=manual so job-scheduler.py skips it; the systemd timer
(OnCalendar=*:27) remains the single dispatch path.
Requested by 646 (DM 2112a7fe): kill the duplicate :27-UTC scheduler entry.