Building an Offline-First Retail Hub in Rust: How ApexEdge Keeps Stores Selling When the Internet Dies

ApexEdge is a Rust-powered store hub orchestrator sitting between POS terminals and HQ systems, enabling continued sales during internet outages via local persistence and async synchronization. It uses a command-envelope design with idempotency keys for safe at-least-once delivery, and a durable outbox pattern to reliably submit orders to HQ without blocking the checkout flow.