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/filters/bpf/Bpf.md

@@ -6,7 +6,7 @@
 | **Inputs**       | Source (close)                          |
 | **Parameters**   | `lowerPeriod`, `upperPeriod`                      |
 | **Outputs**      | Single series (BPF)                       |
-| **Output range** | Tracks input                     |
+| **Output range** | Oscillates around zero           |
 | **Warmup**       | `Math.Max(lowerPeriod, upperPeriod)` bars                          |
 | **Signature**    | [bpf_signature](bpf_signature.md) |
 
@@ -14,7 +14,7 @@
 
 - The **BPF** (BandPass Filter) is a second-order IIR architecture designed to surgically excise specific frequency components from a time series.
 - Parameterized by `lowerperiod`, `upperperiod`.
-- Output range: Tracks input.
+- Output range: Oscillates around zero (bandpass extracts cyclic component).
 - Requires `Math.Max(lowerPeriod, upperPeriod)` bars of warmup before first valid output (IsHot = true).
 - Validated against TA-Lib, Skender, and Tulip reference implementations where available.