refactor(gate-config): 优化数值解析逻辑并提取公共函数

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2026-08-10 e572d99f31f9ca6f54c0fcd7f67dfdcfed034cde

 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;
}