Allow querying configuration

[dfwilbanks395]

We log readyset adapter and server configuration on startup, but it would be nice to have a way to querying this from a running deployment.

[dfwilbanks395]

If our flags are exposed as prometheus metrics, I'm sure we'll be able to build a table to display it in grafana if that's what you're asking

[glittershark]

exposing string flags as time series metrics seems a little… odd

[dfwilbanks395]

Oh I just realized I misunderstood that prometheus image as an example of sending config as prometheus metrics instead of prometheus' internal config. I'm fine with exposing them through a command or separate endpoint. Either way, easy enough to build into grafana

[jasobrown-rs]

@aglover / @gvsg-rs is the intended consumer of this information a human or a program (like a devops script)?

[gvsg-rs]

I was assuming both.