Feat(medusa): add 'edits' to order relations if the feature is enabled (#2263)

**What**
- add "edits" relation if order editing is enabled
- use the featureflag key from the saleschannels flag in loaders

packages/medusa/src/api/routes/admin/orders/index.ts

@@ -9,6 +9,8 @@ import {
 import middlewares, { transformQuery } from "../../../middlewares"
 import { AdminGetOrdersParams } from "./list-orders"
 import { FlagRouter } from "../../../../utils/flag-router"
+import SalesChannelFeatureFlag from "../../../../loaders/feature-flags/sales-channels"
+import OrderEditingFeatureFlag from "../../../../loaders/feature-flags/order-editing"
 
 const route = Router()
 
@@ -16,10 +18,14 @@ export default (app, featureFlagRouter: FlagRouter) => {
   app.use("/orders", route)
 
   const relations = [...defaultAdminOrdersRelations]
-  if (featureFlagRouter.isFeatureEnabled("sales_channels")) {
+  if (featureFlagRouter.isFeatureEnabled(SalesChannelFeatureFlag.key)) {
     relations.push("sales_channel")
   }
 
+  if (featureFlagRouter.isFeatureEnabled(OrderEditingFeatureFlag.key)) {
+    relations.push("edits")
+  }
+
   /**
    * List orders
    */