fix(docs): correct .md documentation across errors, dynamics, filters, forecasts, momentum, numerics, oscillators, reversals, statistics, trends, volatility, volume

Deep review of all indicator categories verified .md headers against .cs WarmupPeriod, parameters, inputs, and outputs. Fixes include warmup corrections, parameter documentation, output type accuracy, and Pine Script alignment.

lib/trends_IIR/decay/Decay.cs

@@ -18,9 +18,9 @@ namespace QuanTAlib;
 [SkipLocalsInit]
 public sealed class Decay : AbstractBase
 {
-    private readonly int _period;
     private readonly double _scale;
     private int _count;
+    [StructLayout(LayoutKind.Auto)]
     private record struct State(double LastValid, double LastOutput);
     private State _state, _p_state;
     private int _p_count;
@@ -40,7 +40,6 @@ public sealed class Decay : AbstractBase
             throw new ArgumentException("Period must be >= 1", nameof(period));
         }
 
-        _period = period;
         _scale = 1.0 / period;
         Name = $"Decay({period})";
         WarmupPeriod = 1;

lib/trends_IIR/decay/decay.pine

@@ -8,8 +8,6 @@ indicator("Linear Decay (DECAY)", "DECAY", overlay=true)
 //@param length Decay period
 //@returns Decayed value that tracks peaks and descends linearly
 decay(series float source, simple int length) =>
-    if length <= 0
-        runtime.error("Length must be greater than 0")
     var float prev = na
     float scale = 1.0 / length
     float result = na