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/bilateral/Bilateral.Validation.Tests.cs

@@ -111,7 +111,7 @@ public sealed class BilateralValidationTests : IDisposable
         _output.WriteLine("Bilateral Span validated successfully against Reference");
     }
 
-    private List<double> GetReferenceData(int period, double sigmaSRatio, double sigmaRMult)
+    private IReadOnlyList<double> GetReferenceData(int period, double sigmaSRatio, double sigmaRMult)
     {
         var reference = new BilateralReference(period, sigmaSRatio, sigmaRMult);
         var results = new List<double>();
@@ -180,7 +180,7 @@ public sealed class BilateralValidationTests : IDisposable
             return sumWeights < 1e-10 ? centerVal : sumWeightedSrc / sumWeights;
         }
 
-        private static double CalculateStDev(List<double> values)
+        private static double CalculateStDev(IReadOnlyList<double> values)
         {
             if (values.Count < 2) return 0;
             

lib/trends/bilateral/Bilateral.cs

@@ -28,9 +28,11 @@ public sealed class Bilateral : AbstractBase
     private readonly RingBuffer _buffer;
     private readonly double[] _spatialWeights;
 
+    [StructLayout(LayoutKind.Auto)]
     private record struct State(double SumSq, double LastValidValue);
     private State _state;
     private State _p_state;
+    private readonly TValuePublishedHandler _handler;
 
     /// <summary>
     /// Creates a Bilateral Filter with specified parameters.
@@ -49,6 +51,7 @@ public sealed class Bilateral : AbstractBase
         _buffer = new RingBuffer(period);
         Name = $"Bilateral({period}, {sigmaSRatio:F2}, {sigmaRMult:F2})";
         WarmupPeriod = period;
+        _handler = Handle;
 
         _spatialWeights = new double[period];
         PrecalculateSpatialWeights();
@@ -57,7 +60,7 @@ public sealed class Bilateral : AbstractBase
     public Bilateral(ITValuePublisher source, int period, double sigmaSRatio = 0.5, double sigmaRMult = 1.0) 
         : this(period, sigmaSRatio, sigmaRMult)
     {
-        source.Pub += (item) => Update(item);
+        source.Pub += _handler;
     }
 
     public override bool IsHot => _buffer.IsFull;
@@ -113,6 +116,9 @@ public sealed class Bilateral : AbstractBase
         _p_state = _state;
     }
 
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private void Handle(object? sender, TValueEventArgs args) => Update(args.Value, args.IsNew);
+
     public override TSeries Update(TSeries source)
     {
         if (source.Count == 0) return [];
@@ -171,7 +177,7 @@ public sealed class Bilateral : AbstractBase
 
         double result = CalculateBilateral();
         Last = new TValue(input.Time, result);
-        PubEvent(Last);
+        PubEvent(Last, isNew);
         return Last;
     }