Add workflow-linter.yml prevention workflow #18

Job	Run time
governance / Workflow security linter	3s
governance / Guix primary / Nix fallback policy	3s
governance / Well-Known (RFC 9116 + RSR)	4s
governance / Security policy checks	4s
governance / Code quality + docs	9s
governance / Language / package anti-pattern policy	3s
	26s

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