added 260907 version of worker toolkit

worker-toolkit-flaredown/repo/backend/app/models/ethnicity.rb

@@ -0,0 +1,8 @@
+class Ethnicity < RankedEnum
+  class << self
+    def all_ids
+      %w[ latino white east_asian south_asian black oceanian
+        middle_eastern native_american african other not_sure ]
+    end
+  end
+end