Add Restart IOM option to main menu (option 4)

New workflow_restart.py supports restarting IOM1 or IOM2 via:
- Network: prompts for password, IP, and IOM, sends GracefulRestart
- Serial: detects device, logs in, prompts for IOM, sends curl restart

Exit shifted from option 4 to option 5.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

es24n_conf.py

@@ -24,6 +24,7 @@ sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "mod
 from ui import _c, C, banner, draw_box, ok, warn, prompt
 from workflow_check import system_check_workflow
 from workflow_firmware import firmware_update_workflow
+from workflow_restart import restart_iom_workflow
 from workflow_serial import configure_shelf
 
 
@@ -34,11 +35,12 @@ def main():
             f"  {_c(C.BOLD, '1')}  Configure Network Settings",
             f"  {_c(C.BOLD, '2')}  Update IOM / Fabric Card Firmware",
             f"  {_c(C.BOLD, '3')}  Query Current Configuration",
-            f"  {_c(C.BOLD, '4')}  Exit",
+            f"  {_c(C.BOLD, '4')}  Restart IOM",
+            f"  {_c(C.BOLD, '5')}  Exit",
         ])
         print()
 
-        choice = prompt("Select [1/2/3/4]")
+        choice = prompt("Select [1-5]")
         if choice == "1":
             another = True
             while another:
@@ -48,9 +50,11 @@ def main():
         elif choice == "3":
             system_check_workflow()
         elif choice == "4":
+            restart_iom_workflow()
+        elif choice == "5":
             break
         else:
-            warn("Please enter 1, 2, 3, or 4.")
+            warn("Please enter 1, 2, 3, 4, or 5.")
             time.sleep(1)
 
     print()