- Add tier39_test.go with per-tier count assertions (T3=12, T4=16, T5=11, T6=15, T7=10, T8=10, T9=8) - Lock all 82 Tier 3-9 provider names against drift via expectedTier3..expectedTier9 slices - Assert total registry provider count == 108 - Existing TestAllPatternsCompile and TestAllProvidersHaveKeywords transitively cover Tier 3-9 regex compilation and keyword presence - Satisfies PROV-03..PROV-09