Update app.py

Fix: Add missing main entry point to launch Gradio

The file was ending after create_enhanced_ui() without
actually launching the app. Added if __name__ == "__main__"
block to start Gradio server.

app.py

@@ -2229,4 +2229,45 @@ def create_enhanced_ui():
             ]
         )
     
-    return demo
+    return demo
+    
+    # === Main Entry Point ===
+if __name__ == "__main__":
+    logger.info("=" * 80)
+    logger.info("Starting Enterprise Agentic Reliability Framework (DEMO READY VERSION)")
+    logger.info("=" * 80)
+    logger.info(f"Python version: {os.sys.version}")
+    logger.info(f"Total events in history: {enhanced_engine.event_store.count()}")
+    logger.info(f"Vector index size: {thread_safe_index.get_count() if thread_safe_index else 0}")
+    logger.info(f"Agents initialized: {len(enhanced_engine.orchestrator.agents)}")
+    logger.info(f"Policies loaded: {len(enhanced_engine.policy_engine.policies)}")
+    logger.info(f"Demo scenarios loaded: {len(DEMO_SCENARIOS)}")
+    logger.info(f"Configuration: HF_TOKEN={'SET' if config.HF_TOKEN else 'NOT SET'}")
+    logger.info(f"Rate limit: {Constants.MAX_REQUESTS_PER_MINUTE} requests/minute")
+    logger.info("=" * 80)
+    
+    try:
+        demo = create_enhanced_ui()
+        
+        logger.info("Launching Gradio UI on 0.0.0.0:7860...")
+        demo.launch(
+            server_name="0.0.0.0",
+            server_port=7860,
+            share=False,
+            show_error=True
+        )
+    except KeyboardInterrupt:
+        logger.info("Received shutdown signal...")
+    except Exception as e:
+        logger.error(f"Application error: {e}", exc_info=True)
+    finally:
+        # Graceful shutdown
+        logger.info("Shutting down gracefully...")
+        
+        if thread_safe_index:
+            logger.info("Saving pending vectors before shutdown...")
+            thread_safe_index.shutdown()
+        
+        logger.info("=" * 80)
+        logger.info("Application shutdown complete")
+        logger.info("=" * 80)