Update messaging

src/Managing.Application.Abstractions/Services/IMessengerService.cs

@@ -27,4 +27,5 @@ public interface IMessengerService
     Task SendFundingRateUpdate(FundingRate oldRate, FundingRate newRate);
     Task SendBacktestNotification(Backtest backtest);
     Task SendGeneticAlgorithmNotification(GeneticRequest request, double bestFitness, object? bestChromosome);
+    Task SendClosedPosition(Position position, User user);
 }