Summary: show/hide metadata columns based on role

We could have a UI similar to what we have for form controls in Control Settings, but show in Form Settings instead.

<img width="484" height="126" alt="Image" src="https://github.com/user-attachments/assets/0af5ce0d-f794-4689-a6ef-4d5764f0eec0" />

[+1 from customer](https://3.basecamp.com/3600924/buckets/7993860/messages/9667679178#__recording_9676575767)