//! Renewable energy forecasting models.
//!
//! - [`persistence`] — Naive (last-value) and diurnal (same-hour-yesterday) persistence,
//! skill score vs. climatology
//! - [`arima`] — AR(p) Yule-Walker estimator, ARIMA(p,d,0), AIC-based order selection
//! - [`nn_bridge`] — [`ForecastModel`](nn_bridge::ForecastModel) trait + adapters for
//! persistence, ARIMA, ensemble, and external neural-network models