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ba661e83a7
Mirrors the existing RHEL `ExtendedSupport` detector for Ubuntu so grype can auto-enable its ESM distro channel on Pro/ESM-enabled scans. `findUbuntuFeatures` sets `linux.Release.ExtendedSupport` when the scanned OS is Ubuntu and any of these hold: - an uncommented apt source (classic `.list` or DEB822 `.sources`, or the ubuntu-advantage auth entry) referencing `esm.ubuntu.com` - an enabled `esm-infra`/`esm-apps` service in the ubuntu-advantage `status.json` cache - an installed dpkg package whose version carries an `[~+]esm` pocket suffix (the usual in-image signal, since containers are rarely Pro-attached) The package fallback reads `s.Artifacts.Packages` from the `DetectFeatures` SBOM callback, which runs after package cataloging, so no new plumbing was needed. Conservative by design: plain Ubuntu and disabled/commented ESM evidence stay false. Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>