Webhook-to-SSE gateway with hierarchical topic routing and signature verification

Fix ko not on PATH in nixery container

go install puts the binary in $GOPATH/bin, which isn't on PATH in the
nixery environment. Adding it explicitly before calling ko.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

+1
+1
.tangled/workflows/ci.yml
··· 27 27 KO_DOCKER_REPO: "atcr.io/guid.foo/wicket" 28 28 command: | 29 29 go install github.com/google/ko@latest 30 + export PATH="$(go env GOPATH)/bin:$PATH" 30 31 echo "${ATCR_APP_PASSWORD}" | docker login atcr.io -u guid.foo --password-stdin 31 32 ko build --bare --tags "latest,$(date -u +%Y%m%d%H%M%S)-$(git rev-parse --short HEAD)" .