fix(core-flows): fixes duplicate fulfillment issue (#8581)

what:

- fixes a bug where fulfilling an outbound item was throwing an error due to the entire order being processed for fulfillment

RESOLVES CC-298

packages/core/core-flows/src/order/workflows/create-fulfillment.ts

@@ -297,7 +297,13 @@ export const createOrderFulfillmentWorkflow = createWorkflow(
     const fulfillment = createFulfillmentWorkflow.runAsStep(fulfillmentData)
 
     const registerOrderFulfillmentData = transform(
-      { order, fulfillment, input, inputItemsMap, itemsList: input.items_list },
+      {
+        order,
+        fulfillment,
+        input,
+        inputItemsMap,
+        itemsList: input.items ?? input.items_list,
+      },
       prepareRegisterOrderFulfillmentData
     )
 

packages/core/core-flows/src/order/workflows/create-shipment.ts

@@ -67,7 +67,7 @@ function prepareRegisterShipmentData({
     reference: Modules.FULFILLMENT,
     reference_id: fulfillment.id,
     created_by: input.created_by,
-    items: order.items!.map((i) => {
+    items: (input.items ?? order.items)!.map((i) => {
       return {
         id: i.id,
         quantity: i.quantity,