docs(phase-4a): record executed archival of both standalone mirrors

[solomonneas]

Ticks the executed Phase 4B checklist items: migration notices landed as ordinary commits (graphtrail PR #44, miseledger PR #44), both mirror master branches ancestry-verified as never rewritten or force-pushed, and both repositories archived on GitHub on 2026-07-21. The product/documentation-link item stays open honestly. Contract test updated to lock the executed state.

Verification: contract test + vale green through brigade work verify run.

Summary by CodeRabbit

• Tests
  • Updated compatibility and archive policy checklist validation to reflect newly completed items.
  • Added verification for the recorded archive dates of designated projects.
  • Adjusted expected totals for completed and pending checklist items.

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📥 Commits

Reviewing files that changed from the base of the PR and between 7a13bce and 0b9d796.

⛔ Files ignored due to path filters (1)

• docs/phase-4a-compatibility-and-archive.md is excluded by !docs/**, !**/docs/**

📒 Files selected for processing (1)

• tests/test_release_metadata.py

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📝 Walkthrough

Walkthrough

The Phase 4A release metadata test now expects updated checklist completion states, archived project entries with dates, and matching checked and unchecked item counts.

Changes

Phase 4A checklist

Layer / File(s)	Summary
Update checklist expectations tests/test_release_metadata.py	The test now expects completed checklist items for archiving graphtrail and miseledger, records their archive dates, and adjusts aggregate checklist counts.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• escoffier-labs/brigade#399: Introduced the Phase 4A checklist assertions updated by this pull request.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: recording the archival of both standalone mirrors.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/phase-4b-executed

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[solomonneas]

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