fix(test): Final synchronization and stability fixes for RAG stress test

- Improved AppController.ai_status to prevent overwriting 'sending...' with 'models loaded'.
- Enhanced 	est_rag_phase4_stress.py with robust polling and increased timeout.
- Synchronized App and AppController history objects to ensure consistent view.

config.toml

@@ -50,7 +50,7 @@ separate_external_tools = false
 "Operations Hub" = true
 Message = false
 Response = false
-"Tool Calls" = true
+"Tool Calls" = false
 Theme = true
 "Log Management" = false
 Diagnostics = false