Two safeguards so a -Stage Pack run never strips launcherVersion/
launcherUrl from the deployed manifest (the original bug that left
old launchers unable to see upgrade prompts):
1. Always pass -LauncherExePath to Build-Pack.ps1 when a local
publish exists, regardless of stage. Previously this only fired
for stages that included Launcher, so Pack-only deploys regressed
the manifest to a version with no launcher metadata.
2. New post-deploy verification step fetches the published manifest
and asserts: pack version matches lockfile, launcherVersion +
launcherUrl present, all self-hosted URLs use the configured
manifest host. Throws on any mismatch.
Matt Sijbers
4e31f5ab1a