Refactor error handling and calculations in TheilU, Wmape, and TukeyBiweight classes; update buffer handling for consistency

- Updated buffer handling in TheilU and Wmape classes to ensure consistency after adding new values.
- Changed the resync interval constant in TukeyBiweight for better clarity.
- Refactored state structures to record structs in Gauss, Hann, Hp, Hpf, Kalman, Loess, Notch, and other filter classes for improved performance and readability.
- Enhanced numerical stability in Mama class calculations using Fused Multiply-Add (FMA) for precision.
- Added comprehensive tests for Atan2 validation to compare .NET's Math.Atan2 with PineScript's implementation, ensuring accuracy across various edge cases.
- Updated NDepend badges to reflect changes in classes, methods, and lines of code.

lib/channels/vwapsd/Vwapsd.cs

@@ -132,8 +132,7 @@ public sealed class Vwapsd : AbstractBase
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public TValue Update(TBar bar, bool isNew = true, bool reset = false)
     {
-        double hlc3 = (bar.High + bar.Low + bar.Close) / 3.0;
-        return Update(new TValue(bar.Time, hlc3), bar.Volume, isNew, reset);
+        return Update(new TValue(bar.Time, bar.HLC3), bar.Volume, isNew, reset);
     }
 
     /// <summary>
@@ -168,6 +167,9 @@ public sealed class Vwapsd : AbstractBase
         // Handle reset
         if (reset || !_state.IsInitialized)
         {
+            // Reset warmup tracking for proper IsHot gating after session reset
+            _index = 1;
+
             if (vol > 0)
             {
                 _state = _state with