Enhance extract_video_id to support shorts and implement DNS-over-HTTPS fallback with socket-level DNS cache override

Remove debug endpoint and finalize NewPipeExtractor v0.26.2

Add debug_extractor endpoint to show stderr of NewPipeExtractor CLI

Upgrade server to multi-stage Docker compilation of NewPipeExtractor v0.26.2

Configure SSL bypass and custom headers for yt-dlp in info and download

Add debug endpoint to test yt-dlp

Deploy END Downloader API with FastAPI and yt-dlp