Fix our breaking change to gracefully leverage our ucp transition schema

Author: raginpirate

source/schemas/shopping/types/fulfillment_method.json

@@ -10,7 +10,7 @@
     "id": {
       "type": "string",
       "description": "Unique fulfillment method identifier.",
-      "ucp_request": {"create": "omit", "update": "optional"}
+      "ucp_request": {"create": "omit", "update": {"transition": {"from": "required", "to": "optional", "description": "Id is becoming optional to support platforms signalling a change of fulfillment method type without knowing the specific id ahead of the transition."}}}
     },
     "type": {
       "type": "string",