* fix(core): de-duplicate 3 indicators by correcting their definitions
Behavioral audit found these computed identically to another indicator:
- AverageDrawdown was the mean per-bar under-water fraction = PainIndex.
Now the conventional average drawdown: mean of the maximum depths of the
distinct drawdown episodes in the window.
- IntradayIntensity was a cumulative line = the A/D Line (Adl); its normalized
form is the Chaikin Money Flow (Cmf). Now the raw per-bar Bostian intensity
volume*(2c-h-l)/(h-l), distinct from both.
- AwesomeOscillatorHistogram was AO - SMA(AO, n) = AcceleratorOscillator. Now
the AO momentum AO[t] - AO[t-lookback] (the histogram delta); the 3rd
parameter is reinterpreted from sma_period to lookback (default 1).
Constructor signatures are unchanged, so the bindings keep their API. Core
unit tests rewritten with the new reference values; workspace tests + clippy
green. Binding value-tests and deep-dive docs are updated separately.
* fix(core): redefine AdOscillator as the A/D Oscillator (was a Wad duplicate)
AdOscillator computed the cumulative volume-free Williams A/D line, identical
to the Wad indicator. Redefine it as the Williams A/D *Oscillator*: the same
line minus its 13-bar SMA, so it oscillates around zero (mean-reverting) while
Wad stays the drifting cumulative line for divergence analysis. The canonical
name AdOscillator is now accurate; the trait name() becomes "ADOSC".
Constructor stays no-arg (internal 13-bar signal). Unit tests rewritten and
cross-checked against Wad - SMA(Wad, 13). The native bindings' "WilliamsAD"
alias is renamed to "ADOSC" separately.
* fix(bindings): rename WilliamsAD alias to ADOSC and update value tests
Follows the core de-duplication: the native bindings exposed the Williams A/D
line as 'WilliamsAD', which is now the A/D Oscillator. Rename the Python /
Node.js / WASM alias to 'ADOSC' (regenerated node index.js / index.d.ts) and
update the binding value-tests for the four redefined indicators
(AverageDrawdown episode mean, AwesomeOscillatorHistogram momentum warmup,
the Wad-line reference test now uses ta.Wad()). Python suite and node suite
both pass (pytest all green, node 584/584).
* docs: record indicator de-duplication in README and CHANGELOG
README volume family: 'Williams A/D' -> 'Williams A/D Oscillator', 'Intraday
Intensity Index' -> 'Intraday Intensity'. CHANGELOG [Unreleased] documents the
four redefinitions and the native WilliamsAD -> ADOSC rename as breaking.
* test(core): cover Default impl and drop dead match arm
Codecov flagged AdOscillator::default() (never exercised) and the unreachable
_ => panic!() arm in the AwesomeOscillatorHistogram test. Exercise Default in
the accessors test and rewrite the histogram check as an if-let, removing the
dead arm.
