Two reviewers in a row read the admin card's selection against `run_deep_backfill`'s, saw it was
missing the job's `recent_synced_at` filter, and called it a card that counts channels the job will
never touch. It is the opposite: the card is the same backlog figure /api/sync/my-status shows the
user, and a channel still missing its recent pull is one the same job tick fetches first. Narrowing
it would hide genuinely queued work. Written down where the next reader will look.