added 260907 version of worker toolkit

worker-toolkit-flaredown/repo/backend/app/models/checkin/fiveable.rb

@@ -0,0 +1,8 @@
+module Checkin::Fiveable
+  extend ActiveSupport::Concern
+
+  included do
+    field :value, type: Integer
+    validates :value, inclusion: {in: (0..4), allow_blank: true}
+  end
+end