* scripts: de-duplicate and harden the close_pull_requests_with_*.sh backlog jobs
Extract the five byte-for-byte-identical backlog-closing scripts into one
parameterized close_pull_requests_with_label.sh and make each named script a
thin wrapper. Addresses the recommendations from #15168:
- Correctness: filter by label server-side (gh pr list --label) instead of
listing all ~900 open PRs and matching client-side, so no PR is skipped by
an arbitrary --limit cap.
- De-duplication: one implementation removes the drift between copies (some
had sleep 2, one had it commented out, two had none).
- Throttling: a single, deliberate SLEEP (default 2s) between closes.
- Safety rails: set -euo pipefail, explicit --repo, and a DRY_RUN=1 preview
mode that prints what would close before a maintainer commits.
- Machine-readable summary (CLOSED_COUNT/CLOSED_PRS) so the Hacktoberfest
tracker can be updated from script output.
Follow-up to #15081.
* updating DIRECTORY.md
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Co-authored-by: priya-sundaram-dev <oc-409d01@agentmail.to>
Co-authored-by: cclauss <cclauss@users.noreply.github.com>
