fix(binance): add support for TRADIFI_PERPETUAL contract type #1098
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Binance introduced TradeFi futures contracts (e.g., XAUUSDT, XAGUSDT) with a new contractType value "TRADIFI_PERPETUAL". These contracts were not being recognized, causing UnsupportedSymbol errors when subscribing to symbols like XAG-USDT-PERP.
This change adds TRADIFI_PERPETUAL to the list of recognized perpetual contract types in the symbol parsing logic.
Reference: https://www.binance.com/en/support/announcement/detail/ecf7318c0d434c339e80878588e700d0
Description of code - what bug does this fix / what feature does this add?