## Don't insert event for non-existent repository

_Want:_ `cibtool` won't insert an event to the queue for a repository

that isn't in the local node.

_Why:_ This prevents adding events that can't ever trigger a CI run.

_Who:_ `cib-devs`

Note that we verify both lookup by name and by repository ID, and by

`cibtool event add` and `cibtool trigger`, to cover all the cases.

~~~scenario

given file radenv.sh

given file setup-node.sh

when I run bash radenv.sh bash setup-node.sh

given an installed cibtool

when I try to run bash radenv.sh cibtool --db x.db event add --repo missing --ref main --commit HEAD --base c0ffee

then command fails

then stderr contains "missing"

when I try to run bash radenv.sh cibtool --db x.db event add --repo rad:z3byzFpcfbMJBp4tKYyuuTZiP8WUB --ref main --commit HEAD --base c0ffee

then command fails

then stderr contains "rad:z3byzFpcfbMJBp4tKYyuuTZiP8WUB"

when I try to run bash radenv.sh cibtool --db x.db trigger --repo missing --ref main --commit HEAD --id-file id.txt

then command fails

then stderr contains "missing"

when I try to run bash radenv.sh cibtool --db x.db trigger --repo rad:z3byzFpcfbMJBp4tKYyuuTZiP8WUB --ref main --commit HEAD --id-file id.txt

then command fails

then stderr contains "rad:z3byzFpcfbMJBp4tKYyuuTZiP8WUB"

~~~