feat(ems): 新增能耗统计与环比分析功能- 添加按日和按月汇总能耗数据的接口与实现

- 实现能耗环比概况的数据结构与基础查询逻辑
- 引入新的查询参数类和返回值对象以支持统计功能
- 配置MyBatis XML映射文件以支持能耗统计数据查询
- 控制器层增加获取能耗趋势和环比信息的新端点

klp-ems/src/main/resources/mapper/EmsEnergyConsumptionMapper.xml

@@ -21,5 +21,31 @@
         <result property="remark" column="remark"/>
     </resultMap>
 
+    <select id="selectDailySummary" resultType="com.klp.ems.domain.vo.SummaryDailyVo">
+        SELECT
+            DATE(end_time) AS day,
+            SUM(consumption) AS totalConsumption
+        FROM
+            ems_energy_consumption
+        WHERE
+            DATE(end_time) BETWEEN #{startDate} AND #{endDate}
+        GROUP BY
+            DATE(end_time)
+        ORDER BY
+            day
+    </select>
+    <select id="selectMonthlySummary" resultType="com.klp.ems.domain.vo.SummaryMonthlyVo">
+        SELECT
+            DATE_FORMAT(end_time, '%Y-%m') AS month,
+            SUM(consumption) AS totalConsumption
+        FROM
+            ems_energy_consumption
+        WHERE
+            DATE_FORMAT(end_time, '%Y') = #{year}
+        GROUP BY
+            DATE_FORMAT(end_time, '%Y-%m')
+        ORDER BY
+            month
+    </select>
 
 </mapper>