stateset-sync

Event-sourcing sync engine for StateSet iCommerce.

Provides the core sync primitives for managing network state between local SQLite stores and the remote VES sequencer:

• Outbox -- append-only event log for recording local mutations
• EventBuffer -- bounded FIFO buffer for pulled remote events
• ConflictResolver -- pluggable strategies (RemoteWins, LocalWins, LastWriterWins)
• Transport -- async trait abstracting push/pull over any network protocol
• SyncEngine -- orchestrator tying outbox, buffer, conflict resolution, and transport together