Mandatory KYC fields for new submerchant onboarding

Compliance changes from our banking provider made recently require sub-merchants of Distribution partners created via the Clients API to supply a minimum KYC dataset.

This update ensures Distribution partner merchants submit all required KYC fields when onboarding sub-merchants, preventing downstream creation failures.

For more information on required manadatory fields for KYC, please refer to this file specification: Clients API