#695 Preserve harness authors across all item mutations

Summary

• route pm update and pm close through the shared harness-aware SDK author resolver
• prove mutation parity with direct command regression coverage and keep repository coverage at 100/100/100/100
• acknowledge the pre-fix unknown-author history events and preserve the complete SDK/CLI delivery closeout
• regenerate the changelog with pm-changelog 2026.7.24

pm lineage

• pm-z9x1r2

Verification

• node scripts/run-tests.mjs coverage — 6,291 tests; 100% statements, branches, functions, lines
• pnpm lint — ESLint, duplication, static quality, docstrings, package boundaries, token surfaces
• pnpm audit --audit-level high — no known vulnerabilities
• pnpm security:scan — no credential-like secrets
• installed-package temporary-directory update/close acceptance with automatic Codex attribution
• pm health --check-only --check-telemetry — healthy, zero actionable unknown-author events

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Summary by cubic

Routes pm update and pm close through the shared harness-aware author resolver to preserve detected authors across all mutations. Also acknowledges pre-fix unknown-author events and regenerates the changelog with pm-changelog.

• Bug Fixes
  • Unified author resolution by using SDK resolveAuthor in both commands; removed local logic to keep SDK/CLI behavior consistent.
  • Added end-to-end tests covering update/close attribution; verified mutation parity and kept coverage at 100%.