Refactor event handling and improve argument validation across indicators

- Updated event handler signatures to use TValueEventArgs for consistency in Mama, Mgdi, Pwma, Rma, Sma, Ssf, Super, T3, Tema, Trima, Usf, Vidya, Wma, and Atr classes.
- Enhanced argument validation by specifying parameter names in exceptions for clarity.
- Adjusted tests to align with new event handler signatures.
- Improved code readability and maintainability by using structured records and lambda expressions.

lib/trends/mama/Mama.Tests.cs

@@ -57,7 +57,7 @@ public class MamaTests
 
         // Manually chain for test
         bool eventFired = false;
-        mama.Pub += (item) => eventFired = true;
+        mama.Pub += (object? sender, TValueEventArgs args) => eventFired = true;
 
         mama.Update(new TValue(DateTime.UtcNow, 100.0));
 

lib/trends/mama/Mama.cs

@@ -18,7 +18,9 @@ public sealed class Mama : AbstractBase
     private readonly double _fastLimit;
     private readonly double _slowLimit;
     private readonly double _scaledFastLimit;
+    private readonly TValuePublishedHandler _handler;
 
+    [StructLayout(LayoutKind.Auto)]
     private record struct State(
         double Period, double Phase, double Mama, double Fama, double SumPr,
         double I2, double Q2, double Re, double Im, double LastValidPrice, int Index
@@ -55,7 +57,7 @@ public sealed class Mama : AbstractBase
     {
         if (fastLimit <= slowLimit || fastLimit <= 0 || slowLimit <= 0)
         {
-            throw new ArgumentException("FastLimit must be > SlowLimit and > 0");
+            throw new ArgumentException("FastLimit must be > SlowLimit and > 0", nameof(fastLimit));
         }
         _fastLimit = fastLimit;
         _slowLimit = slowLimit;
@@ -69,14 +71,17 @@ public sealed class Mama : AbstractBase
 
         Name = $"Mama({fastLimit:F2},{slowLimit:F2})";
         WarmupPeriod = 50;
+        _handler = Handle;
         Init();
     }
 
     public Mama(ITValuePublisher source, double fastLimit = 0.5, double slowLimit = 0.05) : this(fastLimit, slowLimit)
     {
-        source.Pub += (item) => Update(item);
+        source.Pub += _handler;
     }
 
+    private void Handle(object? sender, TValueEventArgs e) => Update(e.Value, e.IsNew);
+
     private void Init()
     {
         Reset();
@@ -229,7 +234,7 @@ public sealed class Mama : AbstractBase
         double mama = Step(input.Value, isNew);
         Last = new TValue(input.Time, mama);
         Fama = new TValue(input.Time, _state.Fama);
-        PubEvent(Last);
+        PubEvent(Last, isNew);
         return Last;
     }