refactor: fix code review findings across all scripts

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.

.github/workflows/validate.yml

@@ -39,9 +39,8 @@ jobs:
       - name: Validate BIOS files
         id: validate
         run: |
-          files=$(cat /tmp/changed_files.txt)
-          if [ -n "$files" ]; then
-            python scripts/validate_pr.py --markdown $files > /tmp/report.md 2>&1 || true
+          if [ -s /tmp/changed_files.txt ]; then
+            xargs python scripts/validate_pr.py --markdown < /tmp/changed_files.txt > /tmp/report.md 2>&1 || true
           else
             echo "No BIOS files changed" > /tmp/report.md
           fi