- CloudKit pagination: fetchAllRecords() handles >400 record batches
with cursor-based pagination (400 records per page)
- Cancellation support: SyncCancellationToken protocol enables graceful
sync termination when background tasks expire
- Per-entity progress: SyncState now tracks timestamps per entity type
so interrupted syncs resume where they left off
- NetworkMonitor: NWPathMonitor integration triggers sync on network
restoration with 2.5s debounce to handle WiFi↔cellular flapping
- wasCancelled flag in SyncResult distinguishes partial from full syncs
This addresses critical data sync issues:
- CloudKit queries were limited to ~400 records but bundled data has ~5000 games
- Background tasks could be killed mid-sync without saving progress
- App had no awareness of network state changes
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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