`fork_tracker` active support module does not play nice with `passenger` and `zk` gems

[niodice]

I wanted to post this here because it's unclear to me if the root problem here is an implementation choice in this library, rails library or passenger library. Any advice is really helpful.

rails/rails#48475

[byroot]

You can take inspiration from Active Support on how to catch forks in a non-obstrusive way: https://github.com/rails/rails/blob/c25cc2ead272a4c3965795139124dfe62ee5a79e/activesupport/lib/active_support/fork_tracker.rb

Note that starting from Ruby 3.1, it's much easier thanks to Process._fork.

[byroot]

I submitted a PR with the suggested changes: #109

@niodice you can probably give this branch a try.