fix(medusa): add payments default relation to getTotalsRelations (#5875)

* bugfix: Add payments relation to getTotalsRelations

* update order test to expect correct paid_total and refundable_amount

packages/medusa/src/services/order.ts

@@ -2081,7 +2081,8 @@ class OrderService extends TransactionBaseService {
     relationSet.add("shipping_methods")
     relationSet.add("shipping_methods.tax_lines")
     relationSet.add("region")
-
+    relationSet.add("payments")
+    
     return Array.from(relationSet.values())
   }
 }