fn validate_pending_key_authorization(
subject: &DoctorSubject,
rpc_chain_id: u64,
chain_timestamp: &ChainTimestamp,
) -> Result<ValidKeyAuthorization, DoctorStep>fn validate_pending_key_authorization(
subject: &DoctorSubject,
rpc_chain_id: u64,
chain_timestamp: &ChainTimestamp,
) -> Result<ValidKeyAuthorization, DoctorStep>