upstream(n8n): docs.n8n.io release-notes 404 -> use GitHub Releases; confirm live 2.27.2->2.31.0 sqlite migration clean

cc-ci-plan/upstream/n8n.md

@@ -10,5 +10,12 @@
   Postgres major version. `18-alpine` = upgrade-on-start to Postgres 18. The compose.postgres.yml
   controls this image; the main compose.yml uses only `n8nio/n8n` (sqlite mode).
 - n8n 2.x: standard rolling upgrade is safe between 2.x versions; DB migrations run automatically on startup.
+  Confirmed live on cc-ci 2026-07-15 (2.27.2 -> 2.31.0, sqlite mode): all TypeORM migrations completed
+  cleanly on boot, editor served HTTP 200 immediately after.
 - The n8n Docker image on Docker Hub uses plain semver tags (e.g. `2.25.3`); no `-stable` suffix needed.
-- n8n release notes: https://docs.n8n.io/release-notes/
+- `https://docs.n8n.io/release-notes/` now 404s (checked 2026-07-15) -- n8n appears to have dropped the
+  docs-site changelog. Use GitHub Releases instead: https://github.com/n8n-io/n8n/releases (tag format
+  `n8n@<version>`, e.g. `n8n@2.31.0`) -- this is the canonical source now.
+- 2.31.0 shipped "private credentials enabled by default" (UI renamed to "end-user credentials") and a
+  Notion node API migration -- functional/UX changes worth a heads-up to the operator, not deployment
+  blockers (no compose/env/migration impact).