upstream(mattermost-lts): 2026-08-04 re-check — 11.9.0 exists, operator-directed bump

cc-ci-plan/upstream/mattermost-lts.md

@@ -17,6 +17,19 @@
   The `release-11.7` Docker Hub floating tag always points to the latest 11.7.x patch.
   IMPORTANT: Do NOT use 11.7.0–11.7.2 — they have a schemeid migration bug in the `roles` table
   when upgrading from 10.11.17+; use 11.7.3 or later (current: 11.7.7).
+  - **2026-08-04 re-check** (endoflife.date/api/mattermost.json; GitHub releases; Docker Hub):
+    **11.7.8** released 2026-07-31 is the newest 11.7.x ESR patch (ESR supported through
+    2027-05-15). **11.9.0** (innovation, released 2026-07-08, cycle EOL **2026-10-15** ~10 weeks,
+    NOT ESR) and **11.8.4** (innovation, EOL 2026-09-15) remain innovation releases — the standing
+    guidance for AUTONOMOUS runs is still "do NOT target innovation; track 11.7 ESR." HOWEVER, the
+    2026-08-03 weekly /upgrade-all operator task **explicitly directed a bump to 11.9.0** (the survey
+    target), so this run targets 11.9.0 per operator instruction with the EOL/innovation status
+    flagged in the plan + PR body + report for operator reconsideration. 11.9.0 confirmed real:
+    GitHub tag `v11.9.0` (published 2026-07-08, not prerelease), Docker Hub
+    `mattermost/mattermost-team-edition:11.9.0` (458 MB, 2026-07-08). Features: Ranked Attributes,
+    ABAC per-action Permission Rules, Program Masking, Azure Blob Storage. `abra recipe upgrade`
+    lists 11.10.0 highest and 11.9.0 next. PR #2 extended 11.7.8 → 11.9.0 (fast-forward). 10.11 ESR
+    security support ENDS 2026-08-15 (~11 days).
   - **2026-07-24 re-check** (endoflife.date/api/mattermost.json; GitHub releases): **11.7.7**
     released 2026-07-17 is the newest 11.7.x ESR patch — bumped PR #2 `11.7.6 → 11.7.7` (ESR security
     patch, "Low to High severity security fixes", no migrations/breaking changes), `!testme` GREEN