fix(oa):修复奖金池服务中获取节点负责人字段错误

- 将查询条件中的 getHeader 字段更正为 getNodeHeader
- 更新流处理映射逻辑以匹配正确的字段名- 确保过滤和收集逻辑使用统一的字段标准

ruoyi-oa/src/main/java/com/ruoyi/oa/service/impl/OaBonusPoolServiceImpl.java

@@ -195,11 +195,11 @@ public class OaBonusPoolServiceImpl implements IOaBonusPoolService {
                     Wrappers.<OaProjectScheduleStep>lambdaQuery()
                             .in(OaProjectScheduleStep::getScheduleId, scheduleIds)
                             .eq(OaProjectScheduleStep::getDelFlag, "0")
-                            .select(OaProjectScheduleStep::getHeader)
+                            .select(OaProjectScheduleStep::getNodeHeader)
             );
             scheduleSteps.stream()
                     .filter(Objects::nonNull) // 过滤null步骤对象
-                    .map(OaProjectScheduleStep::getHeader)
+                    .map(OaProjectScheduleStep::getNodeHeader)
                     .filter(StrUtil::isNotBlank) // 过滤null/空字符串的header
                     .forEach(allNickNames::add); // Set自动去重
         }