chore: add missing tooling ( gitattributes editorconfig CI) #3

Job	Run time
governance / Language / package anti-pattern policy	5s
governance / Guix primary / Nix fallback policy	4s
governance / Security policy checks	6s
governance / Code quality + docs	14s
governance / Workflow security linter	5s
governance / Well-Known (RFC 9116 + RSR)	5s
	39s

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