Update line item discounts based on partner rules

Line items miss partner discounts, causing invoice mismatches and billing delays. This applies correct unit discounts so billing and ops have accurate prices before fulfillment.

Update line item discounts based on partner rules

Overview

Discount mismatches create billing rework and slow distributor order fulfillment; this flow enforces partner and static unit discounts at the moment line items are created. By applying the correct discount within minutes, billing and operations avoid manual corrections and process orders the same day.

Update line item discounts based on partner rules