修正兩處實機部署失敗的 XML bug；新增 DEPLOY.md 紀錄本機 USB 部署

- 根元素加上 xmlns:wcm / xmlns:xsi 命名空間宣告，否則全檔 wcm:action 無法解析（第 27 行第 9 欄即炸）
- ComputerName 改用 *，隨機後綴改由 FirstLogonCommands 的 Rename-Computer 產生；原本 PC-%RAND:5% 並非 Windows Setup 內建巨集，字面送入導致 specialize 階段 Shell-Setup 失敗
- 同步更正 CLAUDE.md / SUMMARY.md 對 %RAND:5% 的錯誤說明
- 新增 DEPLOY.md：/Volumes/Ventoy 的實際檔案佈局與重建步驟

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

unattend.xml

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<unattend xmlns="urn:schemas-microsoft-com:unattend">
+<unattend xmlns="urn:schemas-microsoft-com:unattend"
+          xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 
   <!-- Pass 1: windowsPE — 安裝前的基本設定 -->
   <settings pass="windowsPE">
@@ -80,7 +82,7 @@
                publicKeyToken="31bf3856ad364e35"
                language="neutral"
                versionScope="nonSxS">
-      <ComputerName>PC-%RAND:5%</ComputerName>
+      <ComputerName>*</ComputerName>
       <TimeZone>Taipei Standard Time</TimeZone>
       <RegisteredOwner>IT Department</RegisteredOwner>
       <RegisteredOrganization>YourCompany</RegisteredOrganization>
@@ -158,6 +160,11 @@
         </SynchronousCommand>
         <SynchronousCommand wcm:action="add">
           <Order>3</Order>
+          <CommandLine>powershell.exe -NoProfile -Command "Rename-Computer -NewName ('PC-' + (Get-Random -Minimum 10000 -Maximum 100000)) -Force"</CommandLine>
+          <Description>主機名改成 PC-XXXXX（重開後生效）</Description>
+        </SynchronousCommand>
+        <SynchronousCommand wcm:action="add">
+          <Order>4</Order>
           <CommandLine>shutdown /r /t 5</CommandLine>
           <Description>完成後重開機</Description>
         </SynchronousCommand>