check-fork-drift.sh: diverged forks (kernel, bootloader, installer)
are intentionally ahead of upstream — skip them to suppress spurious
DRIFT warnings during build preflight.
apply-patches.sh: 005-qtbase patch signature now checks correct path
(recipes/wip/qt/qtbase/recipe.toml) and respects local recipe override.
- check-fork-drift.sh: compares each submodule HEAD against upstream/master,
reports behind/ahead counts, exits 1 if any fork exceeds threshold
- upgrade-forks.sh: fetches latest upstream, saves RB commits, resets to
upstream, cherry-picks RB patches with conflict handling and backups
- build-preflight.sh: wired drift check into preflight (threshold=50,
suppressible via REDBEAR_SKIP_DRIFT_CHECK=1)
- bootloader submodule pointer updated to latest upstream rebase