feat(oa):项目盈亏视图增加客户ID字段

- 在ProjectProfitLossVO中添加customerId字段
- 更新SysOaProjectMapper.xml映射文件以包含客户ID
- 支持项目盈亏查询中关联客户信息- 为后续客户维度分析提供数据基础

ruoyi-oa/src/main/java/com/ruoyi/oa/domain/vo/ProjectProfitLossVO.java

@@ -15,6 +15,8 @@ public class ProjectProfitLossVO {
     private Integer tradeType;
     private Date beginTime;
     private String projectStatus;
+    //客户id
+    private Long customerId;
     @JsonFormat(shape = JsonFormat.Shape.STRING)
     private BigDecimal originalFunds;        // 原始合同金额
     private String projectRemark;           // 项目备注（用于判断币种）

ruoyi-oa/src/main/resources/mapper/oa/SysOaProjectMapper.xml

@@ -845,6 +845,7 @@
             p.funds AS original_funds,
             p.remark AS project_remark,
             p.signing_company AS signingCompany,
+            p.customer_id AS customerId,
             COALESCE(finance_details.total_income, 0) AS detail_income,
             COALESCE(finance_details.total_expenditure, 0) AS total_expenditure,
             CASE