`with_lock` causing lots of errors and`perform_token_refresh!` should use atomic save

Issue summary

In Mongoid 9.0, when .refresh_token_if_expired! is called, error is raised "undefined method with_lock' for an instance of Shop (NoMethodError)". with_lock` seems to be a method in ActiveRecord but Mongoid doesn't implement ActiveRecord.

Before opening this issue, I have:

• [ x] Upgraded to the latest version of the package
  • shopify_app version: 23.0
  • Ruby version: 3.3.6
  • Operating system:
• [ x] Set log_level: :debug in my configuration, if applicable
• [ x] Found a reliable way to reproduce the problem that indicates it's a problem with the package
• [x ] Looked for similar issues in this repository
• [x ] Checked that this isn't an issue with a Shopify API
  • If it is, please create a post in the Shopify community forums or report it to Shopify Partner Support

Expected behavior

No error raised

What do you think should happen?

Actual behavior

What actually happens?

Steps to reproduce the problem

Debug logs

// Paste any relevant logs here

Locate the implementation of refresh_token_if_expired! and perform_token_refresh!, then inspect how with_lock is used and how token persistence currently works for Mongoid models. Reproduce the failure with a Mongoid model and verify that refresh succeeds without with_lock while the token update is saved atomically.