System lists (read)

As a third party system using the HR API as the source of truth for my data
I want an API where I can retrieve the items in a system list
So that I understand what options I can query for in the API and I can show my users a list that matches what they see in Cascade.

My application offers the user options to choose from via a selectable list, so we need to know what the valid options are, and being able to pull this programmatically to keep our lists in sync avoids issues where users see out-of-date, no longer valid or missing options.

Manually synchronising these lists is not feasible due to the frequency of change and differing access permissions for users of the separate systems.