fix(audit): supersede #1186 with safe main-based remediation

[BigSimmo]

Summary

Supersedes conflicted PR #1186 (closed without merging). That PR was based on a dirty reconciliation checkpoint (faa50e6e3), carried unresolved conflict markers, and could not merge. This branch ports only the intentional 16-file audit commit onto current main, with the P0/P1 defects fixed.

• Library health CLS skeletons / intrinsic size
• Eval harness bounded concurrency (latency mode stays serial)
• Async heavy-run lock heartbeats, force/stale reclaim
• Dry-run branch:cleanup with argv-safe deletes
• skill:create with correct interface: openai.yaml shape

RAG impact: no retrieval behaviour change - eval harness concurrency and operator tooling only; ranking/imputation/comparator formulas unchanged.

Verification

• Focused Vitest: tests/audit-remediation-tooling.test.ts + force-lock/dead-owner cases
• npm run check:skills (33 canonical skills)
• Prettier on touched files
• Merged latest origin/main (clean; PR MERGEABLE)
• Verification not run: full npm run verify:cheap / verify:pr-local deferred to hosted CI on exact head
• UI verification not run: small Library health skeleton CLS change; covered by hosted Production UI

Risk and rollout

• Risk: medium; touches eval harness concurrency and heavy-run lock reclaim paths, plus a small Documents library-health UI loading state.
• Rollback: revert this PR tip. Do not reopen Implement Audit Recommendations #1186 as the rollback path.

Explicitly not ported from #1186

• Conflicted checkpoint tree / merge markers
• Placeholder skills that would break the 33-skill catalog
• Accidental deletion of composite-action discovery in check-github-action-pins.mjs

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Review details

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 9d8d9705-72ad-4651-b092-d88024144541

📥 Commits

Reviewing files that changed from the base of the PR and between eb443df and 61f6df8.

📒 Files selected for processing (10)

• docs/branch-review-ledger.md
• package.json
• scripts/eval-retrieval.ts
• scripts/run-heavy.mjs
• scripts/skill-create.mjs
• scripts/sweep-merged-branches.mjs
• scripts/test-run-lock.mjs
• src/components/clinical-dashboard/DocumentManagerPanel.tsx
• tests/audit-remediation-tooling.test.ts
• tests/test-runner-safety.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cursor/pr1186-audit-remediation-c94c

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