fix: Remove XCOPY /Q switch from all batch files

Issue: DOS 6.22 does not support XCOPY /Q (quiet mode) switch,
causing "Invalid switch - /Q" error during DEPLOY.BAT execution.

Changes:
- Removed /Q switch from 40 XCOPY commands across 8 BAT files
- Updated check-dos-compatibility.ps1 to detect XCOPY /Q usage
- Created fix-xcopy-q-switch.ps1 automated fix script

Files modified:
- DEPLOY.BAT: 5 XCOPY commands fixed
- UPDATE.BAT: 2 XCOPY commands fixed
- CTONW.BAT: 11 XCOPY commands fixed
- NWTOC.BAT: 2 XCOPY commands fixed
- DEPLOY_VERIFY.BAT, DEPLOY_TEST.BAT, DEPLOY_FROM_NAS.BAT,
  DEPLOY_FROM_AD2.BAT: Test/verification copies updated

DOS 6.22 XCOPY valid switches: /Y /S /E /D /H /K /C
Invalid switches: /Q (quiet mode)

Deployed to:
- D2TESTNAS: /data/test/*.BAT (via scp -O)
- AD2: C:/scripts/sync-copies/bat-files/*.BAT

Testing: DOS machine error "Invalid switch - /Q" resolved

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

check-dos-compatibility.ps1

@@ -26,6 +26,7 @@ $IncompatiblePatterns = @(
     @{Pattern='&&'; Description='&& operator - NOT in DOS 6.22'},
     @{Pattern='\|\|'; Description='|| operator - NOT in DOS 6.22'},
     @{Pattern='\\NUL(?!\s|$)'; Description='\NUL as filename - INVALID (use \*.* for directory test)'},
+    @{Pattern='XCOPY.*\/Q'; Description='XCOPY /Q (quiet mode) - NOT in DOS 6.22'},
     @{Pattern='CHOICE\s+/[A-Z]'; Description='CHOICE with options - Check if CHOICE.COM available'},
     @{Pattern='START\s+'; Description='START command - NOT in DOS 6.22'}
 )