add template application key

db/migrate/20231102171817_add_application_key_to_templates.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class AddApplicationKeyToTemplates < ActiveRecord::Migration[7.0]
+  def change
+    add_column :templates, :application_key, :string
+  end
+end