- Make --no-overwrites option also prevent overwriting of post-processed files
- Fix buggy logic that checked for non-existent orig_path
- Add overwrites parameter to FFmpegExtractAudioPP constructor
- Add comprehensive tests for both --no-overwrites and --no-post-overwrites
- Maintain backward compatibility with existing --no-post-overwrites behavior
Fixes issue where --no-overwrites had no effect on extracted audio files