Feature Request: provide a way to show stats per database

I have lots of databases in my postgres cluster. It seems like the dashboard only shows metrics for the entire cluster.

I would like to see metrics per database so I could debug issues tied to specific databases.

I tried alternative dashboards but since the labels don't line up I can't get them working, even with relabeling. I'm ofcourse happy to hear about existing solutions for this.

No file, test, or entry point is named. Start by tracing the existing cluster-wide dashboard panels and their PostgreSQL metric labels, then determine how per-database series should be exposed and selected; done means metrics can be viewed separately for each database without relabeling.

Written by the indexing model from the issue text.