Shopfloor imaging: CMM type, Configure-PC override fix, serial drivers

- CMM imaging pipeline: WinPE-staged bootstrap + on-logon enforcer
  against tsgwp00525 share, manifest-driven installer runner shared via
  Install-FromManifest.ps1. Installs PC-DMIS 2016/2019 R2, CLM 1.8,
  goCMM; enables .NET 3.5 prereq; registers GE CMM Enforce logon task
  for ongoing version enforcement.
- Shopfloor serial drivers: StarTech PCIe serial + Prolific PL2303
  USB-to-serial via Install-Drivers.cmd wrapper calling pnputil
  /add-driver /subdirs /install. Scoped to Standard PCs.
- OpenText extended to CMM/Keyence/Genspect/WaxAndTrace via
  preinstall.json PCTypes; Defect Tracker added to CMM profile
  desktopApps + taskbarPins.
- Configure-PC startup-item toggle now persists across the logon
  sweep via C:\\ProgramData\\GE\\Shopfloor\\startup-overrides.json;
  06-OrganizeDesktop Phase 3 respects suppressed items.
- Get-ProfileValue helper added to Shopfloor/lib/Get-PCProfile.ps1;
  distinguishes explicit empty array from missing key (fixes Lab
  getting Plant Apps in startup because empty array was falsy).
- 06-OrganizeDesktop gains transcript logging at C:\\Logs\\SFLD\\
  06-OrganizeDesktop.log and now deletes the stale Shopfloor Intune
  Sync task when C:\\Enrollment\\sync-complete.txt is present (task
  was registered with Limited principal and couldn't self-unregister).
- startnet.cmd CMM xcopy block (gated on pc-type=CMM) stages the
  bundle to W:\\CMM-Install during WinPE.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

playbook/shopfloor-setup/Shopfloor/08-EdgeDefaultBrowser.ps1

@@ -199,13 +199,11 @@ function Resolve-StartupUrl {
 # Resolve startup tabs: profile > site-wide > hardcoded fallback
 # Different PC types can have different tabs (e.g. Lab has Webmail
 # instead of Plant Apps, Standard-Machine has Plant Apps).
-$cfgTabs = if ($pcProfile -and $pcProfile.edgeStartupTabs) { $pcProfile.edgeStartupTabs }
-           elseif ($siteConfig -and $siteConfig.edgeStartupTabs) { $siteConfig.edgeStartupTabs }
-           else { $null }
+$cfgTabs = Get-ProfileValue 'edgeStartupTabs'
 
 $startupTabs = @()
 
-if ($cfgTabs) {
+if ($null -ne $cfgTabs -and $cfgTabs.Count -gt 0) {
     foreach ($tab in $cfgTabs) {
         $fallback = if ($tab.fallbackUrlKey -and $siteConfig.urls) { $siteConfig.urls.$($tab.fallbackUrlKey) } else { '' }
         $url = Resolve-StartupUrl -BaseName $tab.baseName -Fallback $fallback