[Feature Request] Add “collapsed by default” display option for custom fields in document detail view

I would like to propose a collapsed_by_default display option on custom field definitions.

When enabled, the custom field would render collapsed by default in the document detail view. The field name/title would remain visible, with an expand affordance to inspect or edit the value. This should apply to any custom field type.

This is only a UI/UX preference, not access control. API behavior, search, filtering, workflows, exports, permissions, and stored values should remain unchanged.

Use case: long or machine-generated custom field values can be useful metadata, but they can dominate the document detail view.