Integrated SOLID + DRY optimizations as new section: - Scoring pipeline (DocumentScorer trait, ScoringPipeline orchestrator) - Policy provider (PolicyProvider trait, pluggable Vault/Postgres/Redis) - RBAC decision engine (AccessChecker composition, short-circuit eval) - Test fixtures (OidcClaimsBuilder, AccessPolicyBuilder) Implementation priority: 1. ScoringPipeline (Phase 3) 2. PolicyProvider trait (Phase 7) 3. AccessChecker composition (Phase 7) 4. Test fixtures (All phases) Unified doc now has: architecture + concrete implementation + SOLID refactoring.