[FEAT] Add new config parameter to set retry count for registration validators on relays

[blevkivskyi-everstake]

Currently, the system continues retrying indefinitely or for an excessive number of times, even when the relay consistently responds with unrecoverable errors like 400 Not a known validator or 429 Too Many Requests. This behavior causes unnecessary network traffic, increases load on relays, and clutters logs with repetitive error messages.

Suggested Parameter

# Maximum number of retries for validator registration per relay
validator_registration_retry_limit = 5

[bhakiyakalimuthu]

Yes, I agree. As a relay operator, this approach helps reduce load on the relay. If you are ok with it, I can go ahead and create a PR for this change right away.

[blevkivskyi-everstake]

Hi @bhakiyakalimuthu, thanks for help, it's great solution