Add failing registrations as a health check

[boulder225]

🎯 Problem to be solved

Currently, users experiencing high validator registration failures don't have a way to monitor these.

The health checks in charon is a good way to report such problems to our users.

🛠️ Proposed solution

• Add a new health check high_registration_failure_rate to the app/check package
• Trigger a warning severity level if >= 70% of registrations fail in an epoch

Tests

Simulate high registration failure rate and check if the health check reports properly in local simnets.

In happy case, you should expect:

In case of high failure rate, expect this instead (high_registration_failure_rate : warning)

[dB2510]

Hey team! Please add your planning poker estimate with Zenhub @dB2510 @gsora @pinebit @xenowits

[pinebit]

Done.