GA-R4 bookend for the dc0-activation part-3 session.
 - Body: docs/changelog-20260808-amphora-geneve.md (amphora two-layer fix [loop-device
   passthrough + retrofit ubuntu-mirror->dc0 mirror; image 775ebeba ACTIVE], o-hm0 MTU PASS,
   1-test-LB blocked by geneve-over-v6, delivery).
 - Sweep: docs/audit/queued-findings-20260808-amphora-geneve.txt (FIRST SURFACE: live mutations
   w/ reverts, test LB/net/amphora LEFT LIVE [teardown owed], retrofit diag traps).
 - CURRENT-STATE part-3 progress block + session-closed pointer.
 - session-ledger: bounded close summary; machine-derived block RE-SEEDED from ledger-scan
   (SEC 29->28 [SEC-031 closed], DOCFIX 210->214, BUNDLEFIX 053->059); rotated 08-06 x2 ->
   archive/session-ledger-rotated-20260809.md (ledger 283 lines).

Gates: repo-lint 0-fail (1 legacy warn); gauntlet ALL GREEN (102); ledger-scan reconciled
(4 open decisions, SEC 28, next-free D-143/DOCFIX-214/BUNDLEFIX-059, no new numbers).

Revert: git revert this commit (records only; live mutations + reverts are in the changelog).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Fg98z7QyzwYUs8fsWCn728