smoke.yml was scaffolding to prove the self-hosted runners could execute
anything at all, back when checkout and the SDK were still unresolved. ci.yml
now builds, gates and releases on both runners, so the smoke jobs only
duplicate its environment checks. Leaving dead workflows around is exactly the
debt that confuses the next reader.
This commit also serves as the pipeline's first real push-triggered run: every
green run so far was a workflow_dispatch.
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