Enable CloudKit sync for Watch app and fix WCSession handling

- Watch now uses CloudKit for data persistence (syncs automatically with iPhone)
- Added iCloud/CloudKit entitlements to Watch app (debug and release)
- Fixed WCSession delegate to handle messages with reply handler
- Watch UI now shows "Already Rated" screen after voting
- Invalidate LiveActivityScheduler cache when mood is logged
- WCSession now used only for immediate UI updates, not data persistence

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Shared/MoodLogger.swift

@@ -80,6 +80,7 @@ final class MoodLogger {
 
         // 3. Update Live Activity
         LiveActivityManager.shared.updateActivity(streak: streak, mood: mood)
+        LiveActivityScheduler.shared.invalidateCache()  // Clear stale hasRated cache
         LiveActivityScheduler.shared.scheduleForNextDay()
 
         // 4. Update tips parameters if requested