docs: regenerate release notes

Author: jmrenouard

releases/v2.9.1.md

@@ -61,6 +61,7 @@
 
 ## 🛠️ Internal Commit History
 
+- test(test): add unit_replication_internals.t to validate Phase 8 replication features (55953ec)
 - docs: regenerate release notes (67d9c47)
 - docs: regenerate release notes (da85245)
 - feat(report): implement phase 6 deep engine tuning and mark phase 8 completed (728dd29)