only propagate cloud eval when depth increases
only propagate cloud eval when depth increases

this should reduce the number of redis messages greatly.

Before that, you could get cevals for pvs greater than yours,
even if your depth is already higher.

arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila