Fetches order book for a trading pair from the registered exchange.
Uses current execution context to determine timing. The underlying exchange
implementation receives time range parameters but may use them (backtest)
or ignore them (live trading).
Parameters
symbol: string
Trading pair symbol (e.g., "BTCUSDT")
Optionaldepth: number
Maximum depth levels (default: CC_ORDER_BOOK_MAX_DEPTH_LEVELS)
Fetches order book for a trading pair from the registered exchange.
Uses current execution context to determine timing. The underlying exchange implementation receives time range parameters but may use them (backtest) or ignore them (live trading).