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.
When a file exists under multiple SHA1s (e.g. awbios.zip in both
Arcade/ and Sega/Dreamcast/), prefer the candidate whose MD5
matches the expected hash instead of always picking the first.
Batocera: 589 -> 661 verified (+72), RetroBat: 341 -> 343 (100%)
