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/superset/init.sh

@@ -10,23 +10,6 @@ set -euo pipefail
 superset db upgrade
 superset init
 
-# Trino was removed on 29 Oct 2026. An instance still holding its connection
-# "Fuel (Trino)" gets it renamed, so its datasets and dashboards keep their ids;
-# the next step points it at fuel-db. Drop this once no instance has it.
-/app/.venv/bin/python - <<'PY'
-from superset.app import create_app
-
-with create_app().app_context():
-    from superset import db
-    from superset.models.core import Database
-
-    old = db.session.query(Database).filter_by(database_name="Fuel (Trino)").one_or_none()
-    if old and not db.session.query(Database).filter_by(database_name="Fuel").count():
-        old.database_name = "Fuel"
-        db.session.commit()
-        print('renamed the connection "Fuel (Trino)" to "Fuel"')
-PY
-
 # No password here: superset_config.py reads it from /run/secrets at connect time.
 superset set-database-uri \
   --database_name "Fuel" \