First when you search File History toolkit, in the knowledge base you will find this article: https://www.ptc.com/en/support/article/CS194622 that says that this is not part of Creo Toolkit functionalities ie there is no direct API.
Second, and to every TSEs reading, whenever you wonder if a Toolkit function exists rely on this rule of thumb: https://www.ptc.com/en/support/article/CS324624 if it is possible from the UI, then it is likely with Toolkit (but not necessarily available).
In this instance, File History is in the grey zone (Existing UI workflow but not Toolkit possible).
