feat(health): add kademlia bootstrap healthcheck + fix test span logging

[gurinderu]

Description

Added a kademlia bootstrap health check.

Motivation

I hope it will fix some tests + reduce test difficulty related to Kad timeouts.

Additional Notes

• nox node initialization is a parallel now
• fixed span names in tests

Checklist

• The code follows the project's coding conventions and style guidelines.
• All tests related to the changes have passed successfully.
• Documentation has been updated to reflect the changes (if applicable).
• All new and existing unit tests have passed.
• I have self-reviewed my code and ensured its quality.
• I have added/updated necessary comments to aid understanding.

Reviewer Checklist

• Code has been reviewed for quality and adherence to guidelines.
• Tests have been reviewed and are sufficient to validate the changes.
• Documentation has been reviewed and is up to date.
• Any questions or concerns have been addressed.