feat: add feature to track every validators in the pool

[qj0r9j0vc2]

Add feature to track every validators in the pool.

to track every validators, the chain should have staking module.

[MattKetmo]

Hello, thanks for your contribution.

I don't think I'll merge it as is, since I see some issues with doing it that way.

• The output should be muted; displaying a row with 100+ validators doesn't make much sense.
• Extracting commissions + votes for each validator for each proposal could lead to too many requests to RPCs, especially if using a public one.

In my opinion, it makes sense to extract already available data, i.e., attested and missed blocks for each validator, but skip all other parts.

That would be an option to fill metrics without displaying more information in the CLI output (i.e., only --validator should be displayed).

Is this what you wanted to achieve with this PR (getting the uptime of all validators)?

Note that I'd also like to work on exposing the average and percentiles of uptime in order to compare the performance of our validators versus the network, but without the need to store all validators' uptime.