refactor: \@LastModifiedBy 설정 휴먼에러 방지를 위한 ScheduleEntity 생성 전용 팩터리 메서드 추가

src/main/kotlin/roomescape/schedule/infrastructure/persistence/ScheduleEntity.kt

@@ -45,12 +45,29 @@ class ScheduleEntity(
     ) {
         time?.let { this.time = it }
         status?.let { this.status = it }
-        MdcPrincipalId.extractAsLongOrNull()?.also { this.updatedBy = it }
+        updateLastModifiedBy()
     }
 
     fun hold() {
         this.status = ScheduleStatus.HOLD
     }
+
+    fun updateLastModifiedBy() {
+        MdcPrincipalId.extractAsLongOrNull()?.also { this.updatedBy = it }
+    }
+}
+
+object ScheduleEntityFactory {
+    fun create(id: Long, date: LocalDate, time: LocalTime, storeId: Long, themeId: Long): ScheduleEntity {
+        return ScheduleEntity(
+            id = id,
+            date = date,
+            time = time,
+            storeId = storeId,
+            themeId = themeId,
+            status = ScheduleStatus.AVAILABLE
+        ).apply { this.updateLastModifiedBy() }
+    }
 }
 
 enum class ScheduleStatus {