Trino out of the code; commit messages name bands and rules

The rename step in init.sh and the guard in deploy/lib.sh are gone. README's
procedure is now "Removing the old project"; it keeps the old names until it
has run on the server. Migrations stay here (open point 8), and their README
says so. AGENTS.md adds the commit-message rule. Not deployed: live still runs
Trino.

Bands: 4 (Superset), persistence (docs). Rules: 2.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

stacks/fuel-monitoring/compose.yaml

@@ -1,6 +1,5 @@
 # Fuel-monitoring analytics: Superset on atoma.petrolyst.com, reading the
-# operational store (fuel-db) directly as the read-only role fuel_ro (Trino was
-# removed on 29 Oct 2026). Run only through deploy/deploy.sh or
+# operational store (fuel-db) directly as the read-only role fuel_ro. Run only through deploy/deploy.sh or
 # deploy/rollback.sh: they export SUPERSET_IMAGE_TAG from the release's
 # ARTIFACTS file, and the :? guard below stops Compose from running without it.
 name: petrolyst