Add scoped Stage 3 fit result bundles #976

Job	Run time
check-fork	3s
Documentation build	18s
check-lock-freshness	9s
check-changelog	1m 4s
PolicyEngine US freshness	6s
decide-test-scope	21s
lint	7s
Quality guards	16s
Pipeline docs build	14s
smoke-test	2m 37s
unit-tests	8m 44s
Validate bundle release manifest contract	1m 4s
Integration tests	1s
	15m 4s

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