Add migration for moving notifications for appendables to reactions

db/migrate/20231028091613_move_appendable_notifications.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class MoveAppendableNotifications < ActiveRecord::Migration[7.0]
+  def up
+    Notification::where(target_type: "Appendable").update_all(target_type: "Reaction") # rubocop:disable Rails/SkipsModelValidations
+  end
+
+  def down
+    Notification::where(target_type: "Reaction").update_all(type: "Appendable") # rubocop:disable Rails/SkipsModelValidations
+  end
+end