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/vidya/Vidya.Validation.Tests.cs

@@ -66,7 +66,7 @@ public class VidyaValidationTests
         _output.WriteLine("VIDYA Batch validated successfully against reference implementation");
     }
 
-    private static List<double> CalculateVidyaReference(TSeries data, int period)
+    private static IReadOnlyList<double> CalculateVidyaReference(TSeries data, int period)
     {
         var results = new List<double>();
         var prices = data.Select(x => x.Value).ToList();

lib/trends/vidya/Vidya.cs

@@ -33,8 +33,9 @@ public sealed class Vidya : AbstractBase, IDisposable
     private readonly RingBuffer _ups;
     private readonly RingBuffer _downs;
     private readonly ITValuePublisher? _source;
-    private readonly Action<TValue>? _pubHandler;
+    private readonly TValuePublishedHandler? _pubHandler;
 
+    [StructLayout(LayoutKind.Auto)]
     private record struct State(
         double PrevClose, double LastVidya,
         double CurrentClose, double CurrentVidya,
@@ -59,7 +60,7 @@ public sealed class Vidya : AbstractBase, IDisposable
     public Vidya(ITValuePublisher source, int period) : this(period)
     {
         _source = source;
-        _pubHandler = (item) => Update(item);
+        _pubHandler = Handle;
         source.Pub += _pubHandler;
     }
 
@@ -71,6 +72,8 @@ public sealed class Vidya : AbstractBase, IDisposable
         }
     }
 
+    private void Handle(object? sender, TValueEventArgs e) => Update(e.Value, e.IsNew);
+
     public override bool IsHot => _state.BarCount >= _period;
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
@@ -277,7 +280,7 @@ public sealed class Vidya : AbstractBase, IDisposable
         if (period <= 0)
             throw new ArgumentException("Period must be greater than 0", nameof(period));
         if (source.Length != output.Length)
-            throw new ArgumentException("Source and output must have the same length");
+            throw new ArgumentException("Source and output must have the same length", nameof(output));
 
         if (source.Length == 0) return;