Refactor and enhance various channel indicators for improved performance and stability

- Updated Codacy instructions to streamline usage guidelines.
- Refactored Bbands class to utilize ArrayPool for memory management, preventing stack overflow on large series.
- Changed Fcb class to use long for monotonic deques to avoid truncation issues.
- Enhanced Kchannel class to ensure safe defaults for non-finite values.
- Improved Maenv class to prevent double-priming during calculations.
- Modified Mmchannel class to ensure non-negative buffer indices and removed unnecessary state tracking.
- Updated Pchannel class to correctly reference IsHot state.
- Refined Regchannel class to avoid double-processing during calculations.
- Enhanced Starchannel class to sanitize non-finite values during calculations.
- Adjusted Stbands.Quantower.cs to allow finer control over multiplier precision.
- Updated Ubands class to only update last valid values on new bars.
- Modified Uchannel.Quantower.cs to allow for finer multiplier precision.
- Enhanced Vwapbands classes to include standard deviation calculations and ensure consistent array lengths.
- Refactored Vwapsd classes to include standard deviation outputs and ensure consistent array lengths.
- Updated MonotonicDeque to use long for indices to prevent overflow.
- Improved Mdape class to handle zero actual values with a substitute value for error calculation.
- Enhanced Rae class to ensure correct state management during updates.
- Refined Wmape class to simplify the logic for finding last valid actual and predicted values.
- Updated Cmf.Quantower classes to ensure MinHistoryDepths reflects the current period.

lib/errors/mdape/Mdape.cs

@@ -74,9 +74,12 @@ public sealed class Mdape : AbstractBase
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private TValue UpdateCore(DateTime time, double actualVal, double predictedVal, bool isNew)
     {
-        if (!double.IsFinite(actualVal))
+        // Validate actual: must be finite AND have sufficient magnitude (matches Batch logic)
+        if (!double.IsFinite(actualVal) || Math.Abs(actualVal) < 1e-10)
         {
-            actualVal = double.IsFinite(_state.LastValidActual) ? _state.LastValidActual : 1.0;
+            actualVal = double.IsFinite(_state.LastValidActual) && Math.Abs(_state.LastValidActual) >= 1e-10
+                ? _state.LastValidActual
+                : 1.0;
         }
         else
         {
@@ -92,10 +95,10 @@ public sealed class Mdape : AbstractBase
             _state.LastValidPredicted = predictedVal;
         }
 
-        // Calculate absolute percentage error
+        // Calculate absolute percentage error (absActual guaranteed >= 1e-10 by validation above)
         double absActual = Math.Abs(actualVal);
         double absError = Math.Abs(actualVal - predictedVal);
-        double percentageError = absActual > 1e-10 ? (absError / absActual) * 100.0 : 0.0;
+        double percentageError = (absError / absActual) * 100.0;
 
         if (isNew)
         {