zonecut: fix possible opportunities to use insecure

... data from cache as keys for validation
5 jobs from secure-zonecut in 31 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
canceled #73075
docker linux amd64
build:linux:amd64

passed #23059
docker linux amd64
build:linux:amd64

00:00:35

 
  Test
passed #23061
docker linux amd64
deckard:linux:amd64

00:00:31

canceled #23062
docker linux amd64 allowed to fail
respdiff:linux:amd64

00:00:15

passed #23060
docker linux amd64
test:linux:amd64

00:00:21