Module metadata 

Metadata tagging utilities for RustifyDL.

This module writes clean, player-friendly tags to downloaded audio files.

Tag strategy by format:

• MP3: Write ID3v2.3 for maximum compatibility.
• FLAC/OGG/OPUS: Write native Vorbis Comments.
• MP4/M4A: Write iTunes/MP4 ilst atoms.
• WAV: Where supported, write RIFF INFO.

Artwork is embedded as the front cover when the container allows it.

Functions

metadata

Write metadata tags and artwork to the given song file.