1c4d2db5e8
Cuts go vet/go test wall time via a shared package-object cache. - pre-commit and test steps move from docker.io/golang:1.26 to the pinned estate gobuilder image (go1.26.7, trusts the internal CA) - wire GOCACHEPROG to go-cache-plugin against the S3 cache bucket, creds from org-level GOCACHE_AWS_* secrets - bump test step memory limit to 4Gi for envtest + -race headroom - buildx steps (build.yaml, docker.yaml) untouched: compilation happens inside Dockerfile.operator, not the Woodpecker step