Optimize FFI bridge serialization and move blocking Swift FFI calls to background

[Maloron]

Summary

This PR addresses performance bottlenecks and UI stuttering/freezes in the iOS application by optimizing FFI boundary serialization and moving synchronous Rust bridge calls off the main thread.

Key Changes

1. Optimized FFI JSON Payloads (Rust):

   • Added an optional include_result flag to ParseFrameBatchArgs in bridge.rs.
   • When set to false (e.g., during packet sync), the bridge skips serializing the massive detailed JSON structures for each parsed frame. This dramatically reduces the FFI string payload size.

2. Background Threading (Swift):

   • Offloaded blocking synchronous FFI calls in refreshBridgeCatalogs(), runPacketScores(), and runSleepScore() from the @MainActor to the background packetInputQueue.async.
   • Ensures UI state updates are correctly dispatched back to the @MainActor once background processing completes.

Impact

• Eliminates UI scroll drops and freezes on the Home and Health views when triggering packet imports or recalculating scores.
• Significantly reduces CPU cycles spent on JSON serialization/deserialization across the C-FFI bridge during background sync.