fix(desktop): update release workflow for Electron migration and add notarization

Fix desktop-release workflow to reference correct package path after
Tauri→Electron migration. Add macOS entitlements and notarization config
for electron-builder.

packages/desktop/electron-builder.yml

@@ -15,6 +15,10 @@ publish:
 mac:
   category: public.app-category.developer-tools
   icon: assets/icon.icns
+  hardenedRuntime: true
+  notarize: true
+  entitlements: build/entitlements.mac.plist
+  entitlementsInherit: build/entitlements.mac.inherit.plist
   extraFiles:
     - from: scripts/paseo
       to: MacOS/paseo