preinstall: run OpenText on Part Marker bays (profiles, EB macros, desktop shortcuts)

OpenText HostExplorer was skipped on Part Marker PCs because its PCTypes
filter in preinstall.json omitted PartMarker, so Setup-OpenText.ps1 never
ran - no MSI, no per-user profile/keymap/menu/macro fan-out, no .eb macros
into ProgramData\Hummingbird\Connectivity\15.00\Shared, and no public
desktop shortcuts.

- preinstall.json: add PartMarker + gea-shopfloor-partmarker to OpenText PCTypes
- 00-PreInstall-MachineApps.ps1: add PartMarker alias group to the preinstall
  matcher (parity with Install-FromManifest.ps1, which already had it)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

playbook/shopfloor-setup/Shopfloor/00-PreInstall-MachineApps.ps1

@@ -321,7 +321,8 @@ foreach ($app in $config.Applications) {
         @('WaxAndTrace',        'gea-shopfloor-waxtrace'),
         @('Genspect',           'gea-shopfloor-genspect'),
         @('Display',            'gea-shopfloor-display'),
-        @('Heattreat',          'gea-shopfloor-heattreat')
+        @('Heattreat',          'gea-shopfloor-heattreat'),
+        @('PartMarker',         'gea-shopfloor-partmarker')
     )
     $myNames = New-Object System.Collections.Generic.HashSet[string]([System.StringComparer]::OrdinalIgnoreCase)
     foreach ($n in @($pcType, $pcProfileKey) | Where-Object { $_ }) {