docs: document canonical hybrid evaluation policy #5

Job	Run time
smoke-runtime (artifact-only, configs/registry_smoke_artifact_matrix.json)	12m 19s
contract-audit	1m 28s
smoke-runtime (sg-only, configs/registry_smoke_matrix.json)	15m 8s
smoke-runtime (baseline, configs/registry_smoke_matrix.json)	14m 22s
	43m 17s

Provide feedback