Add once off job to “migrate” the Rule model

We can’t use an actual activerecord migration because everything is JSON serialised :(

app/initializers/discourse_chat.rb

@@ -48,3 +48,5 @@ require_relative "../services/manager"
 require_relative "../jobs/regular/notify_chats"
 
 require_relative "../../lib/discourse_chat/provider"
+
+require_relative "../jobs/onceoff/add_type_field"

app/jobs/onceoff/add_type_field.rb

@@ -0,0 +1,9 @@
+module Jobs
+  class DiscourseChatAddTypeField < Jobs::Onceoff
+    def execute_onceoff(args)
+      DiscourseChat::Rule.find_each do |rule|
+        rule.save(validate: false)
+      end
+    end
+  end
+end