fix(orchestration): fetch fields from link entities (#14097)

* fix(orchestration): fetch fields from link entities

* args

.changeset/wacky-feet-follow.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/orchestration": patch
+---
+
+fix(orchestration): fetch fields from link entity

packages/core/orchestration/src/joiner/remote-joiner.ts

@@ -1384,6 +1384,8 @@ export class RemoteJoiner {
       const existingExpand = expands.find((exp) => exp.property === midProp)
 
       const extraExtends = {
+        fields: existingExpand?.fields,
+        args: existingExpand?.args,
         ...(midProp === fullAliasProp ? expand : {}),
         property: midProp,
         isAliasMapping: !existingExpand,