Reverse the Douyin-only changes from 15152d66f279601e0626ad2ed42192585ab52e47. Restore deleted video paths and the corresponding metadata without rewriting main history or affecting later uploads outside douyin.
Filter Douyin videos to approved quality categories
Keep high-quality and external-context-hint videos. Retain subtitle-missing videos when no other suboptimal label applies, and preserve missing_subtitles as an auxiliary label.