Set up alerting and SLIs appropriately for ClickHouse Cloud

GitLab Infrastructure Service - incident.io
2026-04-01T22:03:28Z

I'll flesh this out tomorrow. :)

_This ticket was created from_ [_INC-8955_](https://app.incident.io/gitlab/incidents/8955) _using_ [_incident.io_](https://app.incident.io) 🔥