status/backlog(2): Q4.6 discourse blocked (bitnami images gone); pivot to Q4.9 mailu (images pullable)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

machine-docs/STATUS-2.md

@@ -49,6 +49,18 @@ tree must carry:
 - **Q5** — Completeness + docs; flip `## DONE`.
 
 ## In flight
+**Q4.6 discourse — BLOCKED/DEFERRED @2026-05-29.** Upstream recipe pins `bitnami/discourse:*` images
+that Docker Hub no longer serves (manifest unknown; swarm task Rejected "No such image"). Image exists
+at `bitnamilegacy/discourse` but the install tier deploys the prev published version (also gone), so a
+recipe-PR can't unblock testing until upstream releases a fixed version (same class as plausible Q4.7b).
+Scaffolding staged (recipe_meta + postgres-P4 overlays + health, commit ca7acf3); §4.3 create-topic not
+written (deploy blocked). DEFERRED.md 2026-05-29 discourse entry. Node fully torn down/clean.
+**NEXT: Q4.9 mailu** — images pullable (ghcr.io/mailu/*); no recipe-maintainer corpus (P2 vacuous); no
+backupbot label (P4 will be N/A/recipe-PR-deferred like immich). Functional: admin API create domain+
+mailbox + read-back + SMTP/IMAP mail flow. (drone Q4.10 also pullable but needs a gitea OAuth dep for
+functional depth — lower priority.)
+
+
 **Q4.7 plausible — Adversary finding ACK @2026-05-29 (REVIEW-2 `0efcc36`).** Test content + deferral
 verified sound; only gap: my "§4.3 proven green" claim lacks a surviving evidence log on cc-ci.
 Builder action: after mumble, run `RECIPE=plausible PR=0` (or functional subset) when the GitHub/