some strange storage stuff

main.go

@@ -43,11 +43,16 @@ func spawn(id CartId) (*CartGrain, error) {
 		Deliveries:     []*CartDelivery{},
 		Id:             id,
 		Items:          []*CartItem{},
-		// storageMessages removed (legacy event log deprecated)
-		TotalPrice: 0,
+		TotalPrice:     0,
 	}
-	err := loadMessages(ret, id)
-	return ret, err
+	// Set baseline lastChange at spawn; replay may update it to last event timestamp.
+	ret.lastChange = time.Now().Unix()
+
+	// Legacy loadMessages (no-op) retained; then replay append-only event log
+	_ = loadMessages(ret, id)
+	_ = ReplayCartEvents(ret, id)
+
+	return ret, nil
 }
 
 func init() {
@@ -160,7 +165,7 @@ func main() {
 		log.Printf("Error loading state: %v\n", err)
 	}
 	app := &App{
-		pool:    NewGrainLocalPool(65535, 5*time.Minute, spawn),
+		pool:    NewGrainLocalPool(65535, 2*time.Hour, spawn),
 		storage: storage,
 	}
 
@@ -384,11 +389,15 @@ func main() {
 }
 
 func triggerOrderCompleted(err error, syncedServer *PoolServer, order *CheckoutOrder) error {
-	_, err = syncedServer.pool.Apply(ToCartId(order.MerchantReference1), &messages.OrderCreated{
+	mutation := &messages.OrderCreated{
 		OrderId: order.ID,
 		Status:  order.Status,
-	})
-	return err
+	}
+	_, applyErr := syncedServer.pool.Apply(ToCartId(order.MerchantReference1), mutation)
+	if applyErr == nil {
+		_ = AppendCartEvent(ToCartId(order.MerchantReference1), mutation)
+	}
+	return applyErr
 }
 
 func confirmOrder(order *CheckoutOrder, orderHandler *AmqpOrderHandler) error {