fix(cli): ensure zero exit code on successful quiet mode queries (#4601)

cli.py

@@ -8020,6 +8020,12 @@ def main(
                     if response:
                         print(response)
                     print(f"\nsession_id: {cli.session_id}")
+                    
+                    # Ensure proper exit code for automation wrappers
+                    sys.exit(1 if isinstance(result, dict) and result.get("failed") else 0)
+            
+            # Exit with error code if credentials or agent init fails
+            sys.exit(1)
         else:
             cli.show_banner()
             cli.console.print(f"[bold blue]Query:[/] {query}")