On the [Introduce Parameter Object](https://thoughtbot.com/ruby-science/introduce-parameter-object.html) solution page, the code snippet for `app/models/recipient.rb` is missing. <img width="1029" height="279" alt="Image" src="https://github.com/user-attachments/assets/8bb3f74f-4f45-4bcd-9f7f-54fce284fc48" /> link to page: https://thoughtbot.com/ruby-science/introduce-parameter-object.html