Updated health endpoints for Timescale #377

[Ravisaketi]

Proposed changes

Updated health endpoints for Timescale #377

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[github-actions]

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[c0c0n3]

@Necravisaketi this PR isn't really what we want I think. It's my fault as I was very late, like very, answering your question about configured DB backends. See my comments to #705. We should

• implement some function to build the set of configured DBs
• for each DB in the set, perform the health check

I suppose the easiest is to ditch this PR and start over? Again, sorry about that, entirely my fault.