- Created SnapshotManager type in snapshot_manager.go - Encapsulates all snapshot operations with clean API - Added SnapshotStats for observability - Reduced deletion_tracking.go from 557 to 153 lines (72% reduction) - Enhanced merge output with statistics - All tests passing Amp-Thread-ID: https://ampcode.com/threads/T-d82acce9-170d-4e58-b227-fd33d48b8598 Co-authored-by: Amp <amp@ampcode.com>