refactor(vo): 重构VO对象结构，统一字段命名和接口实现

重构所有VO对象，统一字段命名规范，移除冗余字段，优化接口实现
新增Voable接口用于VO对象转换
调整BaseViewModel和ProjectBasedViewModel接口定义
更新相关服务和控制器以适应VO对象变更

common/src/main/java/com/ecep/contract/vo/ContractPayPlanVo.java

@@ -3,6 +3,7 @@ package com.ecep.contract.vo;
 import com.ecep.contract.model.IdentityEntity;
 
 import java.time.LocalDate;
+import java.time.LocalDateTime;
 
 import lombok.Data;
 
@@ -10,10 +11,10 @@ import lombok.Data;
 public class ContractPayPlanVo implements IdentityEntity, ContractBasedVo {
     private Integer id;
     private Integer contractId;
-    private Integer order;
-    private Double amount;
-    private LocalDate planDate;
-    private LocalDate actualDate;
-    private String remark;
+    private Integer refId;
+    private Double payCurrency;
+    private LocalDate payDate;
+    private LocalDateTime updateDate;
+    private String payTerm;
     private boolean paid = false;
 }