fix: round 8 nigeria review blockers and scoring tune #541

Job	Run time
cultures - History arc	7s
cultures - PR base tests	11s
cultures - Audit README bands tests	8s
cultures - Branch scope tests	9s
cultures - Branch scope diff check	6s
cultures - Hofstede README updater tests	8s
cultures - Hofstede bag integrity	8s
Setup - Compute changed files	5s
cultures - Hofstede bag loader tests	9s
cultures - Language pre-flight	8s
cultures - Validation stamp gate	4s
No regions/*.md files changed	0s
khai - Encoding rules	7s
khai - Place rules	11s
khai - Position rules	7s
khai - Persona rules	9s
khai - Piece rules	11s
khai - Process rules	10s
cultures - Section structure	10s
khai - Language rules	14s
cultures - Language policy	11s
khai - Link rules	10s
cultures - Link integrity	0s
cultures - Culture completeness	0s
cultures - Audit README status tables	0s
cultures - Audit table consistency	0s
khai - Phrase denylist rules	0s
cultures - Plagiarism structure	-1s
cultures - Hofstede structure	-1s
cultures - Hofstede derived vs declared	0s
cultures - Hofstede declared vs reference	0s
	3m 1s

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