Brimstone Core R1 1.0.0-rc.16 — cumulative signed application update

Upload the intact archive through Settings / Updates & Recovery.
Includes catalogue/bootleg/video, PostgreSQL, artwork, native hardware volume,
Meridian basic-controls visibility and Evil Kev high-resolution PCM planning fixes.
Original music, user quality settings and queues are retained.
Accepts plain RC14, inspected PCM-hotfixed RC14 and the verified RC15 baseline.
Uses the existing authenticated A/B updater with recovery/rollback retained.
Factory-ISO restart/mount changes remain in source; this app archive does not
rewrite USB media, fstab, network routes, host-specific service overrides or Recovery C.
Native installed Qt GUI is not included. Full 4GiB mixed-load listening qualification
and physical volume-change acceptance remain distinct from regression tests.
