Improve Platform stats

src/Managing.Application.Abstractions/Models/PlatformSummaryViewModel.cs

@@ -51,6 +51,12 @@ public class PlatformSummaryViewModel
     [Id(6)]
     public required int TotalPositionCount { get; set; }
     
+    /// <summary>
+    /// Total platform-wide fees paid in USD
+    /// </summary>
+    [Id(19)]
+    public required decimal TotalPlatformFees { get; set; }
+    
     // 24-hour changes
     /// <summary>
     /// Change in agent count over the last 24 hours
@@ -88,6 +94,12 @@ public class PlatformSummaryViewModel
     [Id(12)]
     public required int PositionCountChange24h { get; set; }
     
+    /// <summary>
+    /// Change in fees over the last 24 hours
+    /// </summary>
+    [Id(20)]
+    public required decimal FeesChange24h { get; set; }
+    
     // Breakdowns
     /// <summary>
     /// Volume breakdown by asset/ticker