feat(stdlib): STDLIB-04b — wire Throws extern `error<T>` (Close… #309

Job	Run time
governance / Well-Known (RFC 9116 + RSR)	34s
governance / Guix primary / Nix fallback policy	34s
governance / Code quality + docs	34s
governance / Security policy checks	34s
governance / Language / package anti-pattern policy	34s
governance / Workflow security linter	34s
	3m 24s

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