fix: remove BOM from GateGridTradeService.java to fix compilation

Administrator

2026-07-13 f8491aa4e0554f9487c8f416f76109c7ec636af1

 src/main/java/com/xcong/excoin/modules/contract/entity/ContractHoldOrderEntity.java

@@ -146,4 +146,9 @@
     * 批次号 队列平仓时使用，避免重复
     */
    public String batchNo;

    /**
     * 持仓费
     */
    private BigDecimal holdAmount;
}