- YouTube MP3/MP4: replaced dead savetube.media + ytdlpyton.nvlgroup.my.id with yt-dlp subprocess - Added find_ytdlp() + run_ytdlp_json() helpers with spawn_blocking for >64KB stdout - Fixed all resp['key'] -> resp.get('key') panics in Twitter, Spotify, KrakenFiles, Danbooru - Removed dead fetch_youtube_v2_mp3/mp4 + decrypt_savetube functions - ScraperError::Http -> AppError::ScraperError -> HTTP 502 instead of 500 - All endpoints now return graceful 502 with error message instead of crashing 500 Tested with real URLs: - YouTube MP3: 200, success, real audio URL extracted - YouTube MP4: 200, success, 48 format URLs extracted - TikTok: 200 (tikwm provider) - MediaFire: 200 (success)
