2026.9.2.1005 - Screen Sharing & audio pitch fixes, IPv6 improvements

Hello everyone!

Just a small update for you with a few fixes and tweaks.

Compatible with current!

Tweaks:
- Refactored the API's handling and logging of IP addresses, improving IPv6 behavior and accuracy (implemented by @gawdl3y, issue #6750)
- Added extra diagnostics to MediaMTX failures (for issue @markn2000, issue #7113)

Locale:
- Merged Chinese locale update by @modimobeikete, @ninnana.

Fixes:
- Fixed desktop streaming not falling back on software encoder when Intel QSV encoder fails (reported by @markn2000, issue #7120)
- Fix setting-dependent modulation artifacts when pitch shifting audio outputs & use different internal parameters to improve the sound quality of pitch shifting overall (reported by charonfaustinus, issue #7092, fixed by @bluecyro)
This is a companion discussion topic for the original entry at https://steamcommunity.com/games/2519830/announcements/detail/686389990174753007