chore(license): flip 148 PMPL→MPL-2.0 SPDX stamps #232

Job	Run time
governance / Guix primary / Nix fallback policy	6s
governance / Licence consistency	10s
governance / Code quality + docs	15s
governance / Security policy checks	8s
governance / Well-Known (RFC 9116 + RSR)	5s
governance / Trusted-base reduction policy	9s
governance / Validate Hypatia baseline	7s
governance / Language / package anti-pattern policy	11s
governance / Workflow security linter	4s
	1m 15s

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