docs: add auto-update implementation plan and rescope roadmap

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/STANDARDS.md

@@ -140,6 +140,6 @@ change to their shape has to stay compatible on its own.
 
 ## Out of scope
 
-Larger or blocked work is tracked in [ROADMAP.md](ROADMAP.md) (update check from
+Larger or blocked work is tracked in [ROADMAP.md](ROADMAP.md) (auto-update from
 GitHub releases, cron-table import/export, window size persistence, History
 column filters).