Mirror the PR #72 fix (applied to ci-dev.yaml) onto ci-stage.yaml and
sdk-release.yaml. The stage and prod release jobs reported FAILURE even
when the el-runtime-c/-h publish SUCCEEDED, because the ancillary ci-base
Docker rebuild (a CI-cache optimization on the fragile host-mode GCE
runner) reddened the whole job.
- Rebuild ci-base step: continue-on-error: true — never blocks/reddens
the job; the SDK publish is the deliverable.
- Publish step: set -euo pipefail + empty-key guard + active-account echo
so a real publish failure still fails loud and is diagnosable.