Feat/wasm call extern #570

Job	Run time
governance / Guix primary / Nix fallback policy	35s
governance / Language / package anti-pattern policy	30s
governance / Workflow security linter	26s
governance / Validate Hypatia baseline	33s
governance / Code quality + docs	39s
governance / Licence consistency	29s
governance / Trusted-base reduction policy	36s
governance / Well-Known (RFC 9116 + RSR)	36s
governance / Security policy checks	35s
	4m 59s

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