Second-pass recovery summary

APP:
- Fully extracted ext4 root filesystem to APP/recovery/extracted_ext4.
- rsync_exit=0; 306,167 entries recovered; extracted tree uses about 59G.

UDA:
- Sparse-padded truncated ext4 and recovered all accessible mounted entries.
- Validated loose carving recovered 2 ARM64 kernel images, 4 ARM64 ELF files, and 4 gzip streams.

RESERVED:
- Identified as an APT binary package cache readable by apt-cache.
- Dumped package names, stats, and full cache dump under RESERVED/recovery/apt_cache.

A_RESERVED_ON_USER:
- Carved the only non-zero span to recovery/carved/nonzero_payload.bin.
- No validated embedded file/container signatures found; high-entropy opaque payload.

RECOVERY_ALT, RECOVERY-DTB_ALT, B_RESERVED_ON_USER:
- Verified all-zero images; no recoverable data present.