Release v2.12.3

Full Changelog: v2.12.2...v2.12.3

Fixed build. v2.12.1 turned out to still have some problems on macOS.

Desktop backend startup

• The bundled backend starts automatically from Lightroom.
• The previous SmartScreen/Gatekeeper manual unblock steps are no longer required for this package.
• Optional manual troubleshooting start:
  • Windows: lrgenius-server/lrgenius-server.cmd
  • macOS: lrgenius-server/lrgenius-server

Docker backend

• Users running the backend via Docker can use the LrGeniusAI-plugin-docker-backend-<version>.zip asset.