R2.1 Changelog

V1 & V2:

 * Reintroduced SLMK with upstream async memory reaping (prevents I/O lockups)

 * Merged latest brickports (from 4.19.325-cip126)

 * Added custom Devfreq Boost driver for smoother UI and app launches

 * Picked mandatory commits for SuSFS support

 * Made SLMK tuning and watermark_scale_factor adaptive to RAM size

 * Added SchedTune Assist

 * Compiled with latest AOSP Clang 22 (r584948)

V2 Specifics:

 * Fixed critical BPF refcount leaks and cgroup crashes

 * Hardened File I/O and BPF against null pointers

 * Enabled CONFIG_CGROUP_NET_PRIO