Add price and currency to list exports

Problem Statement:

Current list exports do not include price and currency fields, forcing clients to manually reconcile financial data across multiple reports. This increases operational effort and risk of reporting errors.

User Story:

As a finance or operations user, I want price and currency included in exports so I can generate accurate revenue reports without manual data merging.

Definition of Done (DoD):

1. Add price and currency fields to lists exports.

2. Add these 2 columns at end of exports.

3. Update export APIs without breaking changes.

4. Ensure UI exports include the new columns.