1.68.1 - IPv6 and proxy support, Linux compatible building, reduced disk fragmentation

Recording, metadata, and networking improvements for the independent Windows and Linux CLI fork.

Highlights

• Smarter metadata handling — Automatic UTF-8 detection and timestamped ICY title logging with --metadata-log.
• Incomplete recording cleanup — Remove short incomplete recordings with --incomplete-min-duration.
• Clearer recording status — Track duration, distinct incomplete / filtered / ripping states, and connection details.
• Reduced disk fragmentation — Automatic 2 MiB preallocation on Windows and Linux ext4.
• IPv6 and proxy support — IPv4/IPv6 selection, HTTP CONNECT, and HTTPS proxies with certificate verification.
• Linux source builds — Validated on Debian 13/WSL2, with separate complete Windows and Linux build guides.

Fixes & Improvements

• Fixed metadata filtering and automatic track numbering.
• Improved MP3 duration headers, AAC frame boundaries, and duration tags.
• Fixed Unicode output in Windows consoles.
• Finalize recordings and clean up short incomplete files when closing the Windows console.
• Prevent concurrent writers in the same directory and conflicting relay listeners.
• Improved recording cleanup, silence detection, and portable packaging.

Configuration Change

• User INI files are no longer loaded or saved automatically.
• Use --config FILE to load settings explicitly; command-line options take precedence.