accountTypeMARGIN_V2, ISOLATED_V2MARGIN, ISOLATEDMARGIN, ISOLATEDMARGIN_V2, ISOLATED_V2 -- same meaning as non-V2 parameters; phased out gradually.lastId is specified, the returned data is earlier than lastId. Otherwise, the system returns the latest data.3 * 24 hours (from 3 * 24 hours ago up to now). If the specified time range exceeds this limit, the system defaults to returning data within the last 3 * 24 hours.bizType is MARGIN_EXCHANGE or ISOLATED_EXCHANGE, the context field includes additional transaction details (order ID, transaction ID, trading pair).