Change webapp to port 9009, add test VM script

- Webapp now listens on port 9009 (UFW rule added)
- Apache reverse proxy updated to proxy to 9009
- test-vm.sh creates a KVM test environment with:
  - CIDATA ISO built from project files
  - Isolated libvirt network (10.9.100.0/24)
  - Ubuntu 24.04 VM with autoinstall

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

playbook/pxe_server_setup.yml

@@ -332,6 +332,7 @@
         - 80
         - 4433
         - 445
+        - 9009
 
     - name: "Enable UFW firewall"
       ufw:
@@ -409,8 +410,8 @@
         content: |
           <VirtualHost *:80>
               ProxyPreserveHost On
-              ProxyPass /manage http://127.0.0.1:5000/
-              ProxyPassReverse /manage http://127.0.0.1:5000/
+              ProxyPass /manage http://127.0.0.1:9009/
+              ProxyPassReverse /manage http://127.0.0.1:9009/
           </VirtualHost>
 
     - name: "Enable Apache proxy modules"