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upstream(mattermost-lts): re-check 2026-07-24, 11.7.7 latest ESR patch

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cc-ci-plan/upstream/mattermost-lts.md
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@ -9,14 +9,20 @@
- mattermost-lts tracks the **11.7 ESR (Extended Support Release)** = Mattermost's LTS line. The "LTS"
concept in Mattermost is **ESR**; there is NO "10.x LTS line". Release calendar (endoflife.date/mattermost):
- **10.11** = previous ESR, security support **ends 2026-08-15** (~7 weeks) — migrated away 2026-06-19
- **11.7** = current ESR, supported through **2027-05-15** (~11 months); latest patch: **11.7.6** (2026-06-25)
- **11.7** = current ESR, supported through **2027-05-15** (~11 months); latest patch: **11.7.7** (2026-07-17)
- **11.8.x** = innovation release (3-month lifecycle, EOL 2026-09-15) — do NOT target
- **10.12** = innovation release, support **EXPIRED 2025-12-15** (do NOT target, despite abra listing 10.12.4)
- Check the release lifecycle at https://endoflife.date/mattermost before each upgrade run.
- Next ESR after 11.7 expected ~February 2027 (9-month cadence)
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: 11.7.6).
when upgrading from 10.11.17+; use 11.7.3 or later (current: 11.7.7).
- **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
(drone run #1143). 11.7 ESR supported through 2027-05-15; 10.11 ESR security support ENDS
2026-08-15 (~3 weeks) — migrate away. 11.8.4 (innovation, EOL 2026-09-15) and 11.9.x remain
innovation releases, NOT ESR — do NOT target.
- **2026-07-13 re-check** (endoflife.date updated 09 Jul 2026): 11.7.6 is still the latest 11.7.x
ESR patch (no newer 11.7.x released since 25 Jun 2026). abra lists 11.9.0 as the highest upgrade,
but 11.9 is a brand-new innovation release NOT on endoflife.date yet — NOT ESR, do NOT target.