chore(license): replace 14 subdir LICENSEs + flip 446 SPDX stamps (Ph… #97

Job	Run time
governance / Security policy checks	7s
governance / Code quality + docs	51s
governance / Validate Hypatia baseline	8s
governance / Well-Known (RFC 9116 + RSR)	6s
governance / Language / package anti-pattern policy	15s
governance / Workflow security linter	11s
governance / Guix primary / Nix fallback policy	7s
governance / Trusted-base reduction policy	14s
governance / Licence consistency	8s
	2m 7s

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