Expose managed databases logs/metrics to external services

[tanandy]

As a customer, I want to expose my managed databases logs/metrics to external services like existing external grafana Then I will be able to follow managed databases inside my own customer observability system (centralization)

[ChrisEU]

I agree. It would be very useful if the database exposes a /metrics endpoint that can be scraped by Prometheus running within a k8s cluster. (exposing that endpoint could be a paid add-on, say a few euros per month)

[thild42]

Duplicate #153