Fix Release build for App Store deployment — manual signing and #if DEBUG guard

- Switch Release config to manual signing (Apple Distribution, SportsTime Dist profile)
- Wrap SyncStatusMonitor.syncFailed call in #if DEBUG to fix Release compilation
- Add deploy instructions to CLAUDE.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

SportsTime/Core/Services/CanonicalSyncService.swift

@@ -371,7 +371,9 @@ final class CanonicalSyncService {
                 SyncLogger.shared.log("⚠️ [SYNC] Failed to save error state: \(saveError.localizedDescription)")
             }
 
+            #if DEBUG
             SyncStatusMonitor.shared.syncFailed(error: error)
+            #endif
 
             throw error
         }