Each run now stages what it built as DorkNet-<release>-PC-Full.zip,
-PC-Patch.zip, -Quest.xapk and -Quest-Installer.zip, writes their sizes and
SHA-256 to a manifest, and uploads them with a static page to an S3 bucket
served read-only (ci/downloads). The build scripts keep their own names,
which the launcher depends on; only the published copies are renamed.
PUBLISH_DOWNLOADS (on by default) turns the upload off per run. Jenkins
archives the same renamed files instead of the raw build output.
Alexa