Allow creation of custom fields in Vacancy form

It would be useful to be able to create custom fields in the Vacancy form in the ATS. We have various elements of a role that need to be approved as part of authorising a new role. Most of these are included in the job description but this is a bit buried in the whole form. It would be useful if we could make these required fields on the front summary page so approvers could see at a glance what they are being asked to approve, e.g. whether it is permanent or fixed term, full-time or part-time, the grade of the role, etc.