feat(mainnet): add xLabs validator 222

[federico2102]

Summary

• add the newly registered xLabs mainnet validator ID 222
• publish its on-chain SECP and BLS public keys using the existing xLabs branding
• keep validator ID 153 unchanged while the Foundation delegation rotation is pending

Validation

• scripts/validate.py passed schema, logo, filename, and on-chain key checks
• scripts/validate_many.py passed for the new validator entry
• registration transaction confirmed successfully at block 95025277

Registration transaction: https://monadvision.com/tx/0xc797ce5e72c7f81222006692c27a749303766496c18fd14bbdee0aa98e20fbab

Tracking: https://app.notion.com/p/3958f16a6aad80679e01cce2557402ab?pvs=204