Add order_by and order_dir parameters to get_saves() for flexible
sorting. Supports "updated_at" and "created_at" fields with "asc" or
"desc" direction (default: desc). Enables ascending order for pruning
scenarios.
- Add device registration and save synchronization
- Implement slot-based save organization with datetime tagging
- Add conflict detection for multi-device sync scenarios
- Add content hash computation for save deduplication
- Support ZIP inner-file hashing for consistent deduplication
- Add confirm_download endpoint for sync state management
- Add overwrite parameter to bypass conflict checks
