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/rae/Rae.cs

@@ -62,6 +62,17 @@ public sealed class Rae : AbstractBase
         double actualVal = actual.Value;
         double predictedVal = predicted.Value;
 
+        // Snapshot BEFORE any mutations for correct rollback
+        if (isNew)
+        {
+            _p_state = _state;
+        }
+        else
+        {
+            _state = _p_state;
+        }
+
+        // Sanitize non-finite values AFTER snapshot/restore
         if (!double.IsFinite(actualVal))
         {
             actualVal = double.IsFinite(_state.LastValidActual) ? _state.LastValidActual : 0.0;
@@ -82,8 +93,6 @@ public sealed class Rae : AbstractBase
 
         if (isNew)
         {
-            _p_state = _state;
-
             // Update actual buffer for mean calculation
             double removedActual = _actualBuffer.Count == _actualBuffer.Capacity ? _actualBuffer.Oldest : 0.0;
             _state.ActualSum = _state.ActualSum - removedActual + actualVal;
@@ -115,8 +124,6 @@ public sealed class Rae : AbstractBase
         }
         else
         {
-            _state = _p_state;
-
             // Update buffers and recalculate sums (buffer state is inconsistent with _p_state)
             _actualBuffer.UpdateNewest(actualVal);
             _state.ActualSum = _actualBuffer.RecalculateSum();
@@ -348,4 +355,4 @@ public sealed class Rae : AbstractBase
             }
         }
     }
-}
+}