graph lib: make interface work the same as old one did
|= [res=resource start=@da]
^- update-log:store
%+ scry-for update-log:store
- /update-log/(scot %p entity.res)/[name.res]/subset/(scot %da start)/'~'
+ /update-log/(scot %p entity.res)/[name.res]/subset/'~'/(scot %da start)
::
++ get-keys
^- resources
