Update position saving and update

src/Managing.Infrastructure.Web3/Services/Gmx/GmxV2Mappers.cs

@@ -171,9 +171,11 @@ internal static class GmxV2Mappers
                     PositionInitiator.User,
                     gmxPosition.Date,
                     new User());
+                // For the Open trade, use the Open trade's ExchangeOrderId if available, otherwise use a new GUID
+                var openExchangeOrderId = gmxPosition.Open?.ExchangeOrderId ?? Guid.NewGuid().ToString();
                 position.Open = new Trade(position.Date, direction, TradeStatus.Filled, TradeType.Market, ticker,
                     (decimal)gmxPosition.Quantity, (decimal)gmxPosition.Price, (decimal)gmxPosition.Leverage,
-                    gmxPosition.Open.ExchangeOrderId, "");
+                    openExchangeOrderId, "");
 
                 if (gmxPosition.TakeProfit1 != null)
                 {