Introduce read-only scrape-lock-status.sh and surface lock state during
operator-handoff so shared Documents archives show active or stale holders
before starting another scrape.
Complete the operator CLI chain so focused yes_general catch-up can run
end-to-end with --target and --channel on handoff dry-run, prove scrape,
and operator-proof orchestration.
Log scrape plan/summary with per-file message deltas in the core script.
Host wrappers and operator entrypoints print target lists; operator-proof
defaults to all enabled targets when --target is omitted.
