feat: v1.95 — smoke/selftest split + G20 CI gate #804

Job	Run time
P0 - SPDX header validation (repo policy)	6s
P1 - AI hallucination guard (Lychee URL validation)	8s
P1 - Zombie dependencies (libyear)	10s
P0 - License compliance (go-licenses)	18s
Summary	4s
	46s

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