2.10Now something important happens to `payload`

Before Salesforce:

payload

[
   {
      External_Customer_ID__c: "CUST-10042",
      Name: "Acme Corporation"
   }
]

After Salesforce Upsert:

payload

is now the Salesforce operation result.

Something conceptually like:

[
  {
    "id": "001xx000003DGbYAAW",
    "success": true
  }
]

This is exactly why we earlier stored:

vars.originalCustomer

The original customer data is still available.