ci: add ABI↔FFI conformance gate (#35) #60

Job	Run time
governance / Check Workflow Staleness	6s
governance / Security policy checks	3s
governance / Guix primary / Nix fallback policy	4s
governance / Well-Known (RFC 9116 + RSR)	4s
governance / Code quality + docs	14s
governance / Workflow security linter	3s
governance / Language / package anti-pattern policy	12s
governance / Licence consistency	6s
governance / Trusted-base reduction policy	7s
governance / Validate Hypatia Baseline	0s
	59s

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