docs(phase-4a): record executed archival of both standalone mirrors (#424)

Migration notices merged as ordinary commits (graphtrail #44, miseledger
#44), both master branches ancestry-verified unrewritten, and both
repositories archived on GitHub on 2026-07-21. One checklist item stays
open: product and documentation link updates to the Brigade release path.

Author: solomonneas

docs/phase-4a-compatibility-and-archive.md

@@ -131,11 +131,11 @@ guidance from documentation.
 - [x] Maintainer decision recorded waiving the dual gate (this document, 2026-07-21).
 - [x] Audit and migrate Brigade-generated MCP configs, including `src/brigade/cursor_user_cmd.py`, from PATH-based `graphtrail-mcp` and `miseledger` commands to managed absolute paths (PR #419).
 - [x] Migrate operator MCP client configuration to the Brigade-managed absolute path installed by `brigade setup` (operator machine migrated 2026-07-21: codex, Cursor, OpenClaw, and Claude configs plus the capped MCP wrapper now use the managed set).
-- [ ] Confirm migration notices as ordinary commits on both mirrors.
-- [ ] Verify that neither standalone `master` branch was rewritten or force-pushed.
+- [x] Confirm migration notices as ordinary commits on both mirrors (graphtrail PR #44 and miseledger PR #44, merged 2026-07-21).
+- [x] Verify that neither standalone `master` branch was rewritten or force-pushed (ancestry-checked against the pre-notice heads on 2026-07-21).
 - [ ] Update product and documentation links to the Brigade release path.
-- [ ] Archive `escoffier-labs/graphtrail`.
-- [ ] Archive `escoffier-labs/miseledger`.
+- [x] Archive `escoffier-labs/graphtrail` (archived 2026-07-21).
+- [x] Archive `escoffier-labs/miseledger` (archived 2026-07-21).
 
 ## Stop and rollback conditions
 

tests/test_release_metadata.py

@@ -106,16 +106,16 @@ def test_phase_4a_compatibility_and_archive_policy_is_tracked():
         "| Compatibility invocation | Current compatibility-equivalent engine command |",
         "Existing databases, data paths, and schemas are non-destructive invariants.",
         "Archiving a mirror freezes it read-only on GitHub. It deletes nothing.",
-        "- [ ] Confirm migration notices as ordinary commits on both mirrors.",
-        "- [ ] Verify that neither standalone `master` branch was rewritten or force-pushed.",
+        "- [x] Confirm migration notices as ordinary commits on both mirrors",
+        "- [x] Verify that neither standalone `master` branch was rewritten or force-pushed",
         "- [ ] Update product and documentation links to the Brigade release path.",
-        "- [ ] Archive `escoffier-labs/graphtrail`.",
-        "- [ ] Archive `escoffier-labs/miseledger`.",
+        "- [x] Archive `escoffier-labs/graphtrail` (archived 2026-07-21).",
+        "- [x] Archive `escoffier-labs/miseledger` (archived 2026-07-21).",
     ):
         assert expected in policy_text
 
     assert "| Published at | 2026-07-21T00:50:15Z |" in text
     assert "| Original dual gate | v0.27.0 + 2026-10-19 calendar gate (waived 2026-07-21) |" in text
     assert "| Current status | Window compressed. Phase 4B authorized pending checklist completion |" in text
-    assert text.count("- [x]") == 3
-    assert text.count("- [ ]") == 5
+    assert text.count("- [x]") == 7
+    assert text.count("- [ ]") == 1