added 260907 version of worker toolkit

worker-toolkit-flaredown/repo/frontend/app/models/promotion-rate.js

@@ -0,0 +1,13 @@
+import DS from 'ember-data';
+
+const {
+  attr,
+  Model,
+  belongsTo,
+} = DS;
+
+export default Model.extend({
+  score: attr('number'),
+  feedback: attr('string'),
+  checkin: belongsTo('checkin'),
+});