feat: add new indicators (Decay, Edecay, MinusDi, MinusDm, PlusDi, PlusDm, Maxindex, Minindex, Sarext) and update pine scripts, core libs, validation tests, and python bindings

lib/numerics/fft/Fft.cs

@@ -212,6 +212,14 @@ public sealed class Fft : AbstractBase
         return result;
     }
 
+    /// <summary>
+    /// Primes the indicator with historical values.
+    /// </summary>
+    /// <remarks>
+    /// Synthetic timestamps are generated by subtracting <c>step × source.Length</c>
+    /// from <see cref="DateTime.UtcNow"/>. For deterministic or replay-safe pipelines
+    /// use <see cref="Update(TValue, bool)"/> directly with explicit timestamps.
+    /// </remarks>
     public override void Prime(ReadOnlySpan<double> source, TimeSpan? step = null)
     {
         TimeSpan interval = step ?? TimeSpan.FromSeconds(1);