add guid to imageoptions and options for challenges

Author: Nicki Nixon

openapi/mx_platform_api.yml

@@ -1651,6 +1651,9 @@ components:
           example: data:image/png;base64,iVBORw0KGgoAAAANSUh ... more image data ...
           nullable: true
           type: string
+        guid:
+          example: CRO-e7ecc864-61fd-47a6-a122-3cbc9016660d
+          type: string
         label:
           example: IMAGE_1
           nullable: true
@@ -2746,6 +2749,10 @@ components:
       type: object
     OptionResponse:
       properties:
+        guid:
+          example: CRO-6d64cc9a-0998-461d-a072-78801143337e
+          nullable: true
+          type: string
         label:
           example: IMAGE_1
           nullable: true