New operation that extracts metadata from 10 audio formats:
MP3 (ID3v2/ID3v1), WAV/BWF/BW64 (RIFF INFO/bext/iXML/axml),
FLAC (Vorbis Comment), OGG Vorbis, Opus, AAC (ADTS), AC3,
WMA (ASF), MP4/M4A, and AIFF. Outputs normalized JSON,
rendered as an HTML table via present().
Includes 28 tests covering all formats with deep validation of
container detection, MIME types, common tags, format-specific
sections (ID3v2 frames, Vorbis comments, ADTS fields, AC3 BSI,
ASF Content Description), and technical metadata values.
18b18d96da