scripts/mac-elevation-host.sh ships as the portable installer added in
#123675, so it is deliberately self-contained and cannot source shared
constants. That forces it to duplicate ELEVATION_TEAM_ID and
ELEVATION_IDENTITY from scripts/codesign-mac-app.sh, with nothing keeping
the two copies in sync. Add a test asserting they agree, so rotation drift
fails at build time instead of on a target Mac.
Also document why the sign-time and install-time elevation verification
functions both exist: verify_elevation_app requires a notarized and stapled
bundle, so it cannot replace the sign-time check, and deleting that check
would defer every identity failure until after a notarization submission is
already spent.
No behavior change: no artifact bytes, filenames, modes, receipt fields,
signing, notarization, or install paths are touched.
Peter Steinberger