Support a random daily run window (random_window_start/end) where the
next auto-run time is derived from a stable per-job hash, avoiding
thundering-herd starts while keeping one run per day. Honors the last
auto-run on initial scheduling so restarts don't double-fire.
Manual triggers can opt into dedupe (dedupe_manual_triggers): an
advisory-locked path collapses concurrent requests onto an existing
pending/running job instead of queueing duplicates. Scheduler error
messages are localized to Chinese.
Register the media_supply_cache_sync job (dry-run aware) and add the
ops migration that seeds it.
root