2. Could we get some callback from GrowthBook that back-service is down? Our case: we want to know when GrowthBook back-service is down and than — send metric to Prometheus to alert our DevOps. My assumption is to have some callback from GrowthBook when it start to response from cache (because back-service is down). Or maybe I don't understand how cache works at all 🙂 (See question #1)