Fix WinPE SMB auth and timeout commands, restore autoinstall disk match

- Add /user:pxe-upload pxe credentials to all net use commands (share requires auth)
- Replace timeout with ping delays (timeout.exe not available in WinPE)
- Restore size: largest disk match in autoinstall (root cause was BIOS RST mode)
- Simplify autoinstall late-commands structure

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

autoinstall/user-data

@@ -35,7 +35,7 @@ autoinstall:
   identity:
     hostname: pxeserver
     username: pxe
-    password: '$6$8AerqUockJh6ycgl$HJFBYjiFqXpzgcU9edto4CMrnaDpEX71Epin.kNTpj57GVjimIDHhcQs0AC4tmkEkKUaj.S/55wsBfMsV0KC71'
+    password: '$6$MV3UwfSxKqxDYCwt$2IPUfSvqpzUdH6QVKHfPH8I9E0SPqNCh0lLvn.D9btxhZUYmceOGcB51Ryfg1Fojlroin.qguSKYFoIDGUIC20'
 
   # Enable SSH
   ssh:
@@ -44,7 +44,7 @@ autoinstall:
 
   # Installer-stage late commands
   late-commands:
-    # Install deb packages from CIDATA USB, then disable cloud-init
+    # Step 1: Install deb packages from CIDATA USB
     - |
       curtin in-target --target=/target -- bash -c '
       mkdir -p /mnt/cidata
@@ -61,51 +61,37 @@ autoinstall:
         fi
         umount /mnt/cidata
       fi
-      # Disable cloud-init AFTER dpkg (dpkg may overwrite earlier disables)
-      mkdir -p /etc/cloud
-      touch /etc/cloud/cloud-init.disabled
-      ln -sf /dev/null /etc/systemd/system/cloud-init.service
-      ln -sf /dev/null /etc/systemd/system/cloud-init-local.service
-      ln -sf /dev/null /etc/systemd/system/cloud-config.service
-      ln -sf /dev/null /etc/systemd/system/cloud-final.service
-      ln -sf /dev/null /etc/systemd/system/cloud-init.target
-      # Disable networkd-wait-online (no gateway on air-gapped network, causes 2min hang)
-      ln -sf /dev/null /etc/systemd/system/systemd-networkd-wait-online.service
       '
 
-    # Create first-boot.sh + disable cloud-init (in same block we know works)
+    # Step 2: Disable networkd-wait-online (hangs on air-gapped network)
+    - ln -sf /dev/null /target/etc/systemd/system/systemd-networkd-wait-online.service
+
+    # Step 3: Create first-boot.sh
     - |
       curtin in-target --target=/target -- bash -c '
-      mkdir -p /etc/cloud/cloud.cfg.d
-      echo "datasource_list: [None]" > /etc/cloud/cloud.cfg.d/99-nocloud.cfg
-      touch /etc/cloud/cloud-init.disabled
-      ln -sf /dev/null /etc/systemd/system/systemd-networkd-wait-online.service
       cat <<"EOF" > /opt/first-boot.sh
       #!/bin/bash
       CIDATA_DEV=$(blkid -L CIDATA)
       if [ -n "$CIDATA_DEV" ]; then
         mkdir -p /mnt/usb
         mount "$CIDATA_DEV" /mnt/usb
-        # Install all offline .deb packages (ansible, dnsmasq, apache2, samba, etc.)
         if compgen -G "/mnt/usb/packages/*.deb" > /dev/null; then
           dpkg -i /mnt/usb/packages/*.deb 2>/dev/null || true
           dpkg -i /mnt/usb/packages/*.deb 2>/dev/null || true
         fi
-        # Run the Ansible playbook
         if [ -f /mnt/usb/playbook/pxe_server_setup.yml ]; then
           cd /mnt/usb/playbook
           ansible-playbook -i localhost, -c local pxe_server_setup.yml
         fi
         umount /mnt/usb
       fi
-      # Disable rc.local to prevent rerunning
       sed -i "s|^/opt/first-boot.sh.*|# &|" /etc/rc.local
       lvextend -r -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv || true
       EOF
+      chmod +x /opt/first-boot.sh
       '
-    - curtin in-target --target=/target -- chmod +x /opt/first-boot.sh
 
-    # Create rc.local without unintended indentation
+    # Step 4: Create rc.local
     - |
       curtin in-target --target=/target -- bash -c '
       cat <<"EOF" > /etc/rc.local
@@ -113,15 +99,11 @@ autoinstall:
       /opt/first-boot.sh > /var/log/first-boot.log 2>&1 &
       exit 0
       EOF
+      chmod +x /etc/rc.local
       '
-    - curtin in-target --target=/target -- chmod +x /etc/rc.local
 
   user-data:
     disable_root: false
-    runcmd:
-      - touch /etc/cloud/cloud-init.disabled
-      - systemctl disable cloud-init.service cloud-init-local.service cloud-config.service cloud-final.service
-      - systemctl mask cloud-init.service cloud-init-local.service cloud-config.service cloud-final.service
 
   refresh-installer:
     update: no