Merge pull request '시스템 사용율 모니터링 기능 테스트' (#159) from feat/training_260303 into develop

Reviewed-on: #159

src/main/java/com/kamco/cd/training/common/service/SystemMonitorService.java

@@ -127,10 +127,15 @@ public class SystemMonitorService {
     long totalDiff = total - prevTotal;
     long idleDiff = idleAll - prevIdle;
 
+    log.info("CPU raw total={}, idle={}", total, idleAll);
+
     // 상태 업데이트
     prevTotal = total;
     prevIdle = idleAll;
 
+    log.info("CPU prev total={}, prev idle={}", prevTotal, prevIdle);
+    log.info("CPU diff totalDiff={}, idleDiff={}", totalDiff, idleDiff);
+
     // CPU 사용률 계산
     return (1.0 - (double) idleDiff / totalDiff) * 100;
   }