Retrieve a lightweight summary of an order — total price, purchased products. Suitable for billing and product-list display; does not return the full submitted payload.

Casing note: this endpoint projects from CorpNet's underlying Salesforce records, so the response uses Salesforce JSON conventions — including the capitalized Id field on the order object (not lowercase id as the API-constructed responses use elsewhere). Plan for this casing inconsistency, or use case-insensitive parsing.

Path parameter is orderId (Salesforce SObject ID, e.g., 801VB00000LcJlVYAV) — same value as data.partnerOrder.orderGuid returned by POST /create-order. The two are interchangeable here.