fix:部分表字段注释及非空 新增获取水印时间接口

shiyunteng

2026-06-01 909270d0f53cc42989b23042d684e8e822aae73b

 platformx-business-finance-api/src/main/java/com/by4cloud/platformx/business/dto/ContractAddDTO.java

@@ -55,6 +55,9 @@
   @Schema(description = "签署日期")
   private Date signDate;

   @Schema(description = "备注")
   private String signPlace;

   @Schema(description = "交付周期")
   private Integer deliveryCycle;