The tauri-action doesn't properly handle Linux sig files in its
artifact discovery. This adds manual steps to upload .sig files and
updater bundles after each platform build, then generates latest.json
in a final job that reads the signatures from the release assets.
- GitHub Action builds for Linux, Windows, macOS on v* tag push
- macOS universal binary (Intel + Apple Silicon)
- Draft release with all installers + updater signatures
- tauri-plugin-updater for built-in auto-update support
Matt