Function market_posture_signal 

pub fn market_posture_signal(
    profile: &FinanceProfile,
    volatility: &FinanceSignal<VolatilityScaleResult>,
    jump_event: &FinanceSignal<FinanceEventDetection<JumpEventResult>>,
    trend_regime: &FinanceSignal<TrendRegimeResult>,
    band_energy: Option<&FinanceSignal<WptBandEnergyResult>>,
    config: &MarketPostureConfig,
) -> Result<FinanceSignal<MarketPosture>>

Compute a composite market posture from required EOD Wave Pack signals.

The posture rule is intentionally transparent. An active jump/stress event — one that is both recent and at least config.event_label_min_warning (see MarketPostureConfig and the posture_active_event helper) — dominates the label; otherwise trend/regime direction selects the posture. Gating on recency and severity keeps the EventDriven label selective: a routine Watch-level blip, or a months-old jump still sitting in the trailing window, no longer saturates the posture.

composite_score is a weight-normalized, signed risk-on/off aggregate (see the posture_composite_score helper). The volatility driver is signed — calm tape is Constructive, stressed tape Risk — rather than always-neutral, and the optional spectral-entropy driver is likewise signed (stable spectrum Constructive, diffuse/unstable Risk). Together with normalization this lets the score reach genuine risk-on territory instead of the old +0.40 cap.

The optional band_energy signal contributes the spectral-entropy / regime-instability driver (weight 0.15): high normalised band-energy entropy flags a diffuse, unstable spectral regime. It is optional because the WPT fingerprint uses a different transform than the posture’s MODWT inputs and so is not part of the single-profile default request; when None (or unavailable) the posture is still computed from the other signals, just without the entropy driver (graceful degradation). The profile parameter stamps methodology metadata.