Pre9 final decoded extent cache kernel and cleanup summary
Date: 2026-08-13

- Guest: FreeBSD 15.0-RELEASE-p8 amd64, QEMU TCG, 6144 MiB, 4 vCPUs.
- KLD built with WITH_ZSTDIO=0 and loaded successfully.
- No EROFS panic, assertion, mount error or decompression error appeared in
  the captured dmesg tail.
- Boot emitted pre-existing root-filesystem "bad dir ino" warnings before
  the test KLD was loaded; these are not attributed to EROFS.
- Explicit LZMA probe, LZMA full-read and LZ4 unmount/md detach operations
  returned zero.
- Test QEMU PID 812999 was terminated.
- Host port 10030 was closed.
- Test overlay was removed.
- Guard QEMU PID 26318 remained alive.
- Guard SSH port 9222 remained open.
