refactor(symbols): 重命名K线时长字段从period到bar

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yesterday 915218a43e8d7eb7b0d938151c6e0e1deba6f152

 src/main/java/com/xcong/excoin/modules/contract/service/ContractOrderService.java

@@ -10,5 +10,4 @@
 */
public interface ContractOrderService extends IService<ContractOrderEntity> {

    public Result submitOrder(SubmitOrderDto submitOrderDto);
}