mev-boost metrics

[twoeths]

Problem description

• Right now we don't have a good way to decide a good min-bid value for mev-boosts
• Also there are 7-10 "no bid received" logs in the last 30 days, this takes up to 20% of mev-boost "/eth/v1/builder/header request. This log mostly means there is no bid greater than our min-bid
• % of block produced locally panel is not easy to view, if I change the rate_interval to 7d the value is >50% - need to double check

Solution description

Add metrics to grafana dashboard (may need to enhance lodestar):

• fix % of published local block (see above)
• histogram metrics of block value for both types of blocks
• track all results of mev-boost requests. At least we should able to answer how many "getHeader" requests returning no bid ("no bid received" log in mev-boost)

Additional context

No response

[twoeths]

the above metrics were for % local blocks produced locally, this is % of local blocks published locally (metrics of vc)

[philknows]

We should push completing this if we want to better understand what min-bid setting works best for us. Will also allow other users to benefit from this too as they likely run mev-boost alongside their setup.