Expose --salvage-only and --salvage-before-scrape on run-operator-validation.sh
and --salvage-before-scrape on run-operator-proof.sh so operators can merge stale
.dce-temp exports before or instead of incremental Discord scrapes.
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.
Add run-operator-proof for one-target handoff/scrape/prove flows.
Prefer podman-compose on Podman hosts but honor DCE_DOCKER_BIN overrides
so offline smokes keep using fake compose shims.
