2026-09-16 Gleason branch image testing

Work Done

Reviewed the prior conversation and histo PR 339. Both Argo steps use the supplied image_tag without a main-only constraint. Dockerfile.argo includes scripts and configs. Build the branch with kuberun build, submit with its returned tag, then use a pinned main- image after merge. No build, workflow submission, or histo edits performed.

Pitfalls

The prototype comment and previous advice incorrectly presented merging as a prerequisite for testing. Image contents, not branch name, are the requirement. Data publication, credentials, HF access, and runtime validation remain separate prerequisites; their live status was not checked.

Improvements

Document branch-image smoke testing separately from production main-image use. The current workflow writes to production vxData and ClearML; branch testing is not a sandbox.