claim(mailu): M2 — DEFERRED closed; PARITY.md updated with dual-volume evidence; operator summary written; PR#3 open for merge; awaiting Adversary fresh re-trigger

machine-docs/DEFERRED.md

@@ -287,6 +287,13 @@ before the build is called done) — but does **not** force closure.
 - **Linked IDEA / BACKLOG:** Q4.6.
 
 ### 2026-05-29 — mailu: no backup config (P4 N/A) — recipe-PR to add backupbot
+- [x] **CLOSED @2026-06-11 (phase mailu, Builder):** Mirror PR#3 (`add-backupbot-labels`, head
+      `edc0201a79d3`) on `git.autonomic.zone/recipe-maintainers/mailu` adds backupbot v2 labels to
+      `admin` service (`/data` SQLite) and `imap` service (`/mail` Maildir). Full lifecycle at PR head
+      = LEVEL 5 (drone build #477): install/upgrade/backup/restore/functional all PASS; both
+      `/data` (SQLite) and `/mail` (Maildir) seeded + wiped + verified restored. Adversary M1 PASS
+      @2026-06-11T21:00Z. PR left open for operator merge. mailu's backup rung is now earned
+      (`backup_capable=True`), not skipped. Phase mailu M1 PASS; M2 claim in progress.
 - [x] **RE-ENTERED @2026-06-11:** operator approved the backupbot recipe-PR route — executing as phase `mailu` (cc-ci-plan/plan-phase-mailu-backup.md).
 - [ ] **What:** mailu (Q4.9) ships **no `backupbot.backup` label** on any service, so cc-ci's
       backup/restore tiers cleanly SKIP (`backup_capable=False`) — P4 (backup data-integrity) is N/A