graph-store: add TODO comment for backwards tap
?< (~(has by archive) resource)
?> (~(has by graphs) resource)
=/ updates=(list [=time upd=logged-update:store])
+ :: TODO: add +bap:orm (backwards tap) and use that
(flop (tap:orm-log update-log))
=| cards=(list card)
|- ^- (quip card _state)
