refactor: n8n 관련 코드 및 이벤트 발행 로직 제거 (#433)

Author: fivedragon5

src/main/java/org/ject/support/domain/apply/service/ApplyService.java

@@ -27,8 +27,6 @@
 import org.ject.support.domain.recruit.exception.RecruitErrorCode;
 import org.ject.support.domain.recruit.exception.RecruitException;
 import org.ject.support.domain.recruit.repository.RecruitRepository;
-import org.ject.support.external.n8n.event.ApplicationSubmittedEvent;
-import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -54,8 +52,6 @@ public class ApplyService implements ApplyUsecase {
     private final Map2JsonSerializer map2JsonSerializer;
     private final String2MapSerializer string2MapSerializer;
 
-    private final ApplicationEventPublisher applicationEventPublisher;
-
     @Override
     @PeriodAccessible(permitAllJob = true)
     @Transactional(readOnly = true)
@@ -170,10 +166,6 @@ public void submitApplication(Long memberId,
 
         // 5. Apply 엔티티에 제출 위임 (검증 및 상태 변경 포함)
         apply.submit(applicationForm);
-
-        // 6. n8n에 지원 완료 이벤트 발행
-        applicationEventPublisher
-                .publishEvent(new ApplicationSubmittedEvent(apply.getId()));
     }
 
     @Override

src/main/java/org/ject/support/external/n8n/client/N8nClient.java

@@ -69,8 +69,3 @@ notification:
     webhook:
       admin-login: dummy-url-for-test
       supporter-token-issue: dummy-url-for-test
-
-n8n:
-  secret-key: n8n-test-secret-key
-  webhook:
-    application-submit: http://localhost:5678/webhook/application-submit

src/main/java/org/ject/support/external/n8n/event/ApplicationSubmittedEvent.java

@@ -27,7 +27,6 @@
 import org.ject.support.domain.recruit.domain.Semester;
 import org.ject.support.domain.recruit.exception.QuestionException;
 import org.ject.support.domain.recruit.repository.RecruitRepository;
-import org.ject.support.external.n8n.event.ApplicationSubmittedEvent;
 import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
 import org.mockito.InjectMocks;
@@ -119,10 +118,6 @@ class ApplyServiceTest extends UnitTestSupport {
 
         // 3. apply의 상태가 SUBMITTED로 변경되었는지 확인
         assertThat(apply.getStatus()).isEqualTo(SUBMITTED);
-
-        // 4. AdminLoginNotificationEvent 이벤트가 발행되었는지 확인
-        verify(applicationEventPublisher)
-                .publishEvent(any(ApplicationSubmittedEvent.class));
     }
 
     @Test
@@ -174,8 +169,6 @@ class ApplyServiceTest extends UnitTestSupport {
         // then
         assertThat(apply.getStatus()).isEqualTo(SUBMITTED);
         assertThat(applicationForm.getPortfolios()).hasSize(1);
-        verify(applicationEventPublisher)
-                .publishEvent(any(ApplicationSubmittedEvent.class));
     }
 
     @Test