Petrolyst server infrastructure: Traefik, Trino and Superset

Traefik as the server-wide edge (TLS via Let's Encrypt, dashboard on
traefik.petrolyst.com behind oauth2-proxy and Keycloak). The
fuel-monitoring stack: Superset on atoma.petrolyst.com with Keycloak login
and Petrolyst branding, Trino reading the TimescaleDB fuel-db as catalog
"fuel". Customization lives in petrolyst-insights/, deployment in the other
folders.

Deploys run server-side (deploy/deploy.sh) from a Gitea workflow or
manually; releases are immutable, Superset metadata is backed up before
migrations, and deploy/rollback.sh restores it.

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

stacks/fuel-monitoring/trino/etc/catalog/fuel.properties

@@ -0,0 +1,5 @@
+# The fuel-monitoring operational store (service fuel-db), read-only.
+connector.name=postgresql
+connection-url=jdbc:postgresql://fuel-db:5432/fuel
+connection-user=trino_ro
+connection-password=${ENV:FUEL_DB_TRINO_PASSWORD}