변화탐지 포인트 형식 수정, 폴리곤 json으로 리턴

src/main/java/com/kamco/cd/kamcoback/changedetection/service/ChangeDetectionService.java

@@ -39,7 +39,7 @@ public class ChangeDetectionService {
     return changeDetectionCoreService.getChangeDetectionPolygonList(analUid, mapSheetNum);
   }
 
-  public List<ChangeDetectionDto.PointFeature> getChangeDetectionPointList(
+  public ChangeDetectionDto.PointFeatureList getChangeDetectionPointList(
       Long analUid, String mapSheetNum) {
     return changeDetectionCoreService.getChangeDetectionPointList(analUid, mapSheetNum);
   }