fix(indicator): IndicatorValueMapper 恢复 @Mapper 注解（与既有 mapper 约定一致；@MapperScan 兜底但保持统一风格）

cfc-backend/src/main/java/com/etotem/cfc/mapper/IndicatorValueMapper.java

@@ -3,8 +3,10 @@ package com.etotem.cfc.mapper;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.etotem.cfc.entity.IndicatorValue;
 import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 
+@Mapper
 public interface IndicatorValueMapper extends BaseMapper<IndicatorValue> {
 
     /** 幂等写：同 (source_type, source_id, definition_id) 覆盖更新（uk_source_definition） */