• Add -e option to add album gain normalization method per AES77 (using loudest track's gain)
• When skipping files with existing gain information (-S mode), also consider Opus header gain information
• Fix memory-related bug
• Handle exception when setting locale
• Static builds: Upgrade to FFmpeg 8

Source SHA256: 54037f73ba6682f9b71b2265275f5f89de50b90b12d5af512287c60d9d52c9cc