Close canonical artifact-mode coverage gaps #4

Job	Run time
smoke-runtime (artifact-only, configs/registry_smoke_artifact_matrix.json)	12m 39s
contract-audit	1m 29s
smoke-runtime (baseline, configs/registry_smoke_matrix.json)	12m 55s
smoke-runtime (sg-only, configs/registry_smoke_matrix.json)	15m 16s
	42m 19s

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