ci: Restart pipeline with black version alignment

Black 23.9.1 alignment completed for CI compatibility.
All formatting checks now pass locally.

CHANGELOG.md

@@ -189,6 +189,8 @@ Today's development session focused on successfully deploying the Phase 3 RAG im
 
 **⏰ Session Timeline**: October 17, 2025 - Comprehensive development session covering production deployment preparation and CI/CD pipeline compliance for Phase 3 RAG implementation.
 
+**🔄 CI/CD Status**: October 18, 2025 - Black version alignment completed (23.9.1), pipeline restart triggered for final validation.
+
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 ### 2025-10-17 - Phase 2B Complete - Documentation and Testing Implementation