scripts/pipeline.py runs the full retrobios pipeline in one command:
1. generate_db --force (rebuild database.json)
2. refresh_data_dirs (update data directories, skippable with --offline)
3. verify --all (check all platforms)
4. generate_pack --all (build ZIP packs)
5. consistency check (verify counts == pack counts per platform)
Flags: --offline, --skip-packs, --include-archived, --include-extras.
Summary table shows OK/FAILED per step with total elapsed time.
