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/blma/Blma.Tests.cs

@@ -139,7 +139,8 @@ public class BlmaTests
         var input = new double[] { 1, 2, 3, 4, 5 };
         var timestamps = new List<DateTime>();
         
-        blma.Pub += (item) => timestamps.Add(item.AsDateTime);
+        blma.Pub += (object? sender, TValueEventArgs args) => timestamps.Add(args.Value.AsDateTime);
+
         
         blma.Prime(input);
         
@@ -164,7 +165,8 @@ public class BlmaTests
         ];
         var timestamps = new List<DateTime>();
         
-        blma.Pub += (item) => timestamps.Add(item.AsDateTime);
+        blma.Pub += (object? sender, TValueEventArgs args) => timestamps.Add(args.Value.AsDateTime);
+
         
         blma.Prime(input);
         

lib/trends/blma/Blma.Validation.Tests.cs

@@ -42,7 +42,7 @@ public class BlmaValidationTests
         }
     }
 
-    private static List<double> CalculateReference(TSeries source, int period)
+    private static IReadOnlyList<double> CalculateReference(TSeries source, int period)
     {
         var result = new List<double>();
         var buffer = new List<double>();

lib/trends/blma/Blma.cs

@@ -11,6 +11,7 @@ public sealed class Blma : AbstractBase, IDisposable
     private readonly RingBuffer _buffer;
     private readonly double[] _weights;
     private readonly double _weightSum;
+    private readonly TValuePublishedHandler _handler;
     private ITValuePublisher? _publisher;
     private bool _hasLast;
 
@@ -31,26 +32,27 @@ public sealed class Blma : AbstractBase, IDisposable
         
         // Pre-calculate weights for the full period
         _weightSum = CalculateWeights(period, _weights);
+        _handler = Handle;
     }
 
     public Blma(ITValuePublisher source, int period) : this(period)
     {
         _publisher = source;
-        source.Pub += Handle;
+        source.Pub += _handler;
     }
 
     public void Dispose()
     {
         if (_publisher != null)
         {
-            _publisher.Pub -= Handle;
+            _publisher.Pub -= _handler;
             _publisher = null;
         }
     }
 
-    private void Handle(TValue value)
+    private void Handle(object? sender, TValueEventArgs args)
     {
-        Update(value);
+        Update(args.Value, args.IsNew);
     }
 
     public override void Reset()
@@ -118,7 +120,7 @@ public sealed class Blma : AbstractBase, IDisposable
         var tValue = new TValue(input.Time, result);
         Last = tValue;
         _hasLast = true;
-        PubEvent(tValue);
+        PubEvent(tValue, isNew);
         return tValue;
     }