Unified async Rust API for 47 exchange connectors (REST + WebSocket). The core layer — pure ExchangeHub + connectors. Higher-level builder, persistence, replay, OB tracker live in `digdigdig3-station`.
//! # L1 — Price / OHLCV data feeds only
//!//! L1 connectors provide market data (prices, klines, tickers) but do NOT
//! include L2 orderbook data or execution capabilities.
pubmodfree;pubmodpaid;