aggregate: ingest proven-tests JSON run reports (new input kind) #260

Job	Run time
governance / Check Workflow Staleness	9s
governance / Language / package anti-pattern policy	16s
governance / Guix primary / Nix fallback policy	6s
governance / Security policy checks	6s
governance / Well-Known (RFC 9116 + RSR)	28s
governance / Code quality + docs	36s
governance / Workflow security linter	33s
governance / Licence consistency	30s
governance / Trusted-base reduction policy	32s
governance / Validate Hypatia Baseline	-1s
	3m 15s

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