refactor(infrared-reading-meter-service): 优化电表分组查询接口返回结构

- 将 getDailyAndTotalElectricityAsMap 方法的返回类型从 List<Map<String, Object>> 改为 Result
- 使用 Result.ok() 包装查询结果，统一返回结构

infrared-reading-meter-service/src/main/java/com/zksy/infrared/controller/InfraredReadingMeterController.java

@@ -90,7 +90,7 @@ public class InfraredReadingMeterController {
 
     @GetMapping("/dailyAndTotalMap")
     @ApiOperation(value = "电表分组查询")
-    public List<Map<String, Object>> getDailyAndTotalElectricityAsMap() {
-        return service.getDailyAndTotalElectricityAsMap();
+    public Result getDailyAndTotalElectricityAsMap() {
+        return Result.ok(service.getDailyAndTotalElectricityAsMap());
     }
 }