lighthouse Add attestation duty slot metric

Issue Addressed

Resolves #2521

Proposed Changes

Add a metric that indicates the next attestation duty slot for all managed validators in the validator client.

Oct 12 '21 13:10 pawanjay176

Pending testing with high validator numbers.

Oct 12 '21 14:10 pawanjay176

just fyi There is a conflict now

Oct 20 '21 14:10 divagant-martian

By default, the metric is only provided when the vc manages < 64 validators.

Provided an additional enable-high-validator-count-metrics flag for enabling the attestation duty metrics for > 64 validators. Although, this doesn't increase memory/cpu for high validator counts either (5k validators on prater).

Oct 20 '21 18:10 pawanjay176

Is this something we can get in a future release? Most of the other CC's have this feature. Would love to see LH have it.

Aug 02 '22 02:08 Woogz-git

If you'd be open to resolving these conflicts @pawanjay176 I'd be happy to continue to review! I think it just fell off the radar at some point, apologies.