provide time utils to get now instant with micro seconds

src/main/java/com/flowci/common/TimeUtils.java

@@ -0,0 +1,11 @@
+package com.flowci.common;
+
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+
+public abstract class TimeUtils {
+
+    public static Instant now() {
+        return Instant.now().truncatedTo(ChronoUnit.MICROS);
+    }
+}

src/main/java/com/flowci/common/model/EntityListener.java

@@ -1,25 +1,23 @@
 package com.flowci.common.model;
 
+import com.flowci.common.TimeUtils;
 import jakarta.persistence.PrePersist;
 import jakarta.persistence.PreUpdate;
 
-import java.time.Instant;
-import java.time.temporal.ChronoUnit;
-
 public class EntityListener {
 
     @PrePersist
     public void prePersist(Object entity) {
         if (entity instanceof EntityBase e) {
-            e.createdAt = Instant.now().truncatedTo(ChronoUnit.MICROS);
-            e.updatedAt = Instant.now().truncatedTo(ChronoUnit.MICROS);
+            e.createdAt = TimeUtils.now();
+            e.updatedAt = TimeUtils.now();
         }
     }
 
     @PreUpdate
     public void preUpdate(Object entity) {
         if (entity instanceof EntityBase e) {
-            e.updatedAt = Instant.now().truncatedTo(ChronoUnit.MICROS);
+            e.updatedAt = TimeUtils.now();
         }
     }
 }