Follow-up: use UUID external type on ID property like in Sync docs

Author: greenrobot-team

objectbox_test/test/entity.dart

@@ -476,6 +476,7 @@ class HnswObject {
 @ExternalName(name: 'my-mongo-entity')
 class EntityWithExternalType {
   @Id()
+  @ExternalType(type: ExternalPropertyType.uuid)
   int id = 0;
 
   @Property(type: PropertyType.byteVector)

objectbox_test/test/objectbox-model.json

@@ -735,6 +735,7 @@
           "id": "1:3044824951282217899",
           "name": "id",
           "type": 6,
+          "externalType": 102,
           "flags": 1
         },
         {