CLAP-291 Fix: 테스트 케이스 오류 수정

Author: parkjaehak

src/test/java/clap/server/TestDataFactory.java

@@ -138,6 +138,7 @@ public static Task createTask(Long id, String taskCode, String title, TaskStatus
                 .category(category)
                 .taskStatus(taskStatus)
                 .finishedAt(finishedAt)
+                .requester(createUser())
                 .processor(processor)
                 .label(createLabel())
                 .build();