- fix KeyError in compute_coverage (generate_readme, generate_site)
- fix comma-separated MD5 handling in generate_pack check_inside_zip
- fix _verify_file_hash to handle multi-MD5 for large files
- fix external downloads not tracked in seen_destinations/file_status
- fix tar path traversal in _is_safe_tar_member (refresh_data_dirs)
- fix predictable tmp path in download.py
- fix _sanitize_path to filter "." components
- remove blanket data_dir suppression in find_undeclared_files
- remove blanket data_dir suppression in cross_reference
- add status_counts to verify_platform return value
- add md5_composite cache for repeated ZIP hashing
Critical: stream large file downloads (OOM fix), fix basename match
in auto_fetch, include hashes in pack grouping fingerprint, handle
not_in_zip status in verify, fix escaped quotes in batocera parser.
Important: deduplicate shared group includes, catch coreinfo network
errors, fix NODEDUP path component match, fix CI word splitting on
spaces, replace bare except Exception in 3 files.
Minor: argparse in list_platforms, specific exceptions in download.py.
