128a6e079e
- Implement all 8 FormatHandler trait methods - Use lofty 0.24 for ID3v2.4 tag creation/parsing - Map all 36 AudioMeta fields to ID3v2 frames - Handle ID3v2 header parsing for audio_start - Detect ID3v1 tags at EOF for audio_end - Add 13 comprehensive unit tests - Fix test-utils AudioMeta construction with ..Default::default() - All tests pass, LSP diagnostics clean