Add agent fees

src/Managing.Application.Abstractions/Grains/IPlatformSummaryGrain.cs

@@ -26,6 +26,12 @@ public interface IPlatformSummaryGrain : IGrainWithStringKey
     [OneWay]
     Task UpdateActiveStrategyCountAsync(int newActiveCount);
 
+    /// <summary>
+    /// Increments the total agent count when a new agent is activated
+    /// </summary>
+    [OneWay]
+    Task IncrementAgentCountAsync();
+
     [OneWay]
     Task OnPositionClosedAsync(PositionClosedEvent evt);