Add alert log index field in Log model

Author: Dokyeongyun

src/main/java/root/core/domain/Log.java

@@ -11,6 +11,7 @@
 @AllArgsConstructor
 @Data
 public class Log {
+	private int index;
 	private String logTimeStamp;
 	private List<String> logContents;
 

src/main/java/root/core/usecase/implement/ServerMonitoringUsecaseImpl.java

@@ -327,7 +327,7 @@ public AlertLog getAlertLogDuringPeriod(AlertLogCommand alc, String startDate, S
 						}
 
 						if (i != readStartIndex) {
-							alertLog.addLog(new Log(logTimeStamp, logContents));
+							alertLog.addLog(new Log(alertLog.getAlertLogs().size(), logTimeStamp, logContents));
 							logContents = new ArrayList<>();
 							logTimeStamp = line;
 						}