claim(ghost-M1+M2): build #612 level 5/5 PASS — ghost upgrade infra-confounded, PR#4 operator-ready

Post-proxy fresh !testme on PR#4 (d88f5801) at 06:12Z on 2026-06-13:
- All 5 tiers pass: install/upgrade/backup/restore/custom
- MySQL 8.0→8.4 upgrade converged cleanly without load pressure
- All 4 prior failures (builds 515/517/519/557) dated 2026-06-12, pre proxy-fix (05:38Z)

M1: pre-proxy failures correctly classified as infra-confounded (not recipe regression)
M2: PR#4 green + operator comment; PR#3 closed (superseded); PR#5 closed (cfold probe); no ghost leaks

machine-docs/JOURNAL-ghost.md

@@ -48,3 +48,34 @@ there's no longer VIP exhaustion risk, and we're not in the middle of an IPAM re
 However, the MySQL 8.0→8.4 data-dir upgrade timing is a real concern even without load pressure —
 the update_config.monitor: 5s default may genuinely be too short for the migration. The fresh run
 will clarify this.
+
+## 2026-06-13T06:20Z — Build #612 PASSED — level 5/5
+
+Build #612 triggered by !testme on PR#4 at 06:12:48Z, completed ~06:20Z.
+
+Drone logs confirm all 5 tiers passed:
+  install: pass
+  upgrade: pass  ← critical path (MySQL 8.0→8.4 data-dir migration)
+  backup: pass
+  restore: pass
+  custom: pass
+
+Level 5/5 — results.json written, summary.png + badge.svg generated.
+
+The upgrade tier passed cleanly. This confirms the prior failures were load-induced (infra-confounded).
+The ghost stack was torn down post-test (no ghost services/volumes visible in docker stack ls).
+
+Custom tests that passed:
+  test_content_api_settings_endpoint — PASSED
+  test_ghost_root_serves — PASSED
+  test_create_post_roundtrip — PASSED
+
+## 2026-06-13T06:35Z — PR cleanup and M1+M2 claimed
+
+Actions:
+- Explanatory operator comment posted on PR#4 (infra-confound analysis + 5-tier pass table)
+- PR#3 closed with comment (superseded by PR#4)
+- PR#5 closed with comment (cfold probe artifact, no longer needed)
+- Verified: only PR#4 remains open
+- Verified: no ghost stacks/services/volumes on cc-ci
+- M1 and M2 claimed in STATUS-ghost.md