Add support for loading object edits history

[cacabo]

Background

This is blocked on object edits history support via Objects Gateway

This would be useful for our scheduling apps to show the history of edits to shifts for a schedule. For example, I could show all changes since the user last loaded the application. Right now we have to do that through custom log objects—it would be better if we could use the out-of-the-box stuff!

Another workaround is to show a Workshop overlay on top of an OSDK app if the app is embedded in a Workshop.

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Interface

Ideally we'd support loading for individual Objects or for an Object Set (similar to how this works in Workshop).

This is sort of similar to searching around to a linked object type, but perhaps should use a disjoint verb from pivot to not conflate the two.