fix: LocalDateTime.toString()시 초가 잘리는 문제 fix

src/main/java/cokr/xit/ens/core/utils/DateUtil.java

@@ -592,7 +592,8 @@ public class DateUtil {
             localDateTime = localDateTime.plusHours(hour);
             localDateTime = localDateTime.plusMinutes(minute);
             localDateTime = localDateTime.plusSeconds(second);
-            result = localDateTime.toString();
+            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
+            result = localDateTime.format(formatter);
         } catch (Exception e) {
             log.error("DateUtils::getCalculatorDateAndTime", e);
         }