Include Charge ID & Customer ID in Refunds

🔍 Problem Statement

The finance team is unable to efficiently reconcile refunds between NetSuite and Pelcro because the charge_id and associated customer_id are not available in the refunds API response. This prevents accurate tracking of refunds back to their original transactions and customers.

💡 User Story

1. As a developer, I want the /refunds API response to include the charge_id and customer_id so that I can link each refund to its originating transaction and customer record for reconciliation and reporting.

🎯 Definition of Done (DoD)

1. The List /refunds Core API response includes both charge_id and customer_id fields.