Reduce duplicate native helpers

[snbafana]

Summary

• delete the unused live-permission request wrapper in the root window controller
• use the existing CLI JSON decoder helper for root snapshot/status decoding
• collapse duplicate native permission ordering and reuse the existing Messages DB path constant

Dedup decision

Rechecked the native owner surfaces before editing. trackLivePermissionRequests had no call sites, permissionOrder and defaultPermissionOrder were identical, and CuedNative already had shared helpers for CLI JSON decoding and the Messages database path. This PR reduces those duplicates in place without splitting native files or touching debugSync / messages_automation, which still have product/test references.

Verification

• rg for trackLivePermissionRequests, defaultPermissionOrder, and defaultMessagesDBPath
• swift build --package-path native/macos/CuedNative -c release
• swift test --package-path native/macos/CuedNative
• commit hook: pnpm check:app-quality
• pre-push hook: pnpm check:ci-local