Blender Git Commit Log

Move back path, image etc. to FileDirEntry.

Also, reduce revision's uuid to 64bytes, should be more than enough!

Thing is, we can expect tens (if not hundreds) of thousands of revisions from a
big assets repository with history storage (vcs). So we want that struct
to be as small as possible.

Also, we do not expect to handle several variants/revisions of a same asset within
a same 'context' (there is always only one active variant & rev). So storing
path & co at entry level shall be enough. And helps make code simpler/nicer.