feat(credit): 新增客户发布日期字段

- 在示例数据中添加 releaseDate 字段
- 在实体映射中增加 releaseDate 属性同步逻辑

src/main/java/com/gxwebsoft/credit/controller/CreditUserController.java

@@ -237,6 +237,7 @@ public class CreditUserController extends BaseController {
         CreditUserImportParam example = new CreditUserImportParam();
         example.setCode("CUS001");
         example.setName("示例客户");
+        example.setReleaseDate("2023-01-01");
         example.setType(0);
         example.setRole("采购方");
         example.setInfoType("企业");
@@ -303,6 +304,7 @@ public class CreditUserController extends BaseController {
 
         entity.setCode(param.getCode());
         entity.setName(param.getName());
+        entity.setReleaseDate(param.getReleaseDate());
         entity.setType(param.getType());
         entity.setRole(param.getRole());
         entity.setInfoType(param.getInfoType());