fix(medusa): Deleted discount missing on order (#6837)

* Fix deleted discount missing on order

* Added integration test

* Added changeset

packages/medusa/src/repositories/order.ts

@@ -10,6 +10,7 @@ import {
 
 const ITEMS_REL_NAME = "items"
 const REGION_REL_NAME = "region"
+const DISCOUNTS_REL_NAME = "discounts"
 
 export const OrderRepository = dataSource.getRepository(Order).extend({
   async findWithRelations(
@@ -28,8 +29,11 @@ export const OrderRepository = dataSource.getRepository(Order).extend({
           where: { id: In(entitiesIds) },
           select: ["id"],
           relations: rels,
-          withDeleted:
-            topLevel === ITEMS_REL_NAME || topLevel === REGION_REL_NAME,
+          withDeleted: [
+            ITEMS_REL_NAME,
+            REGION_REL_NAME,
+            DISCOUNTS_REL_NAME,
+          ].includes(topLevel),
           relationLoadStrategy: "join",
         })
       })