Citadel v0.4.3

Automated patch release.

Includes updater metadata (latest.json) for Tauri updater clients.

What's Changed

• ci(release): add Apple signing and notarization env wiring by @phildenhoff in #98
• chore(release): bump version to v0.4.2 by @phildenhoff in #97

Full Changelog: v0.4.2...v0.4.3