feat: 클라이언트 유량제어/RequestProcessor custom 패키지로 분리

- DJBRequestProcessor: inbound.processor → custom.inbound.processor 이동
- ClientInflowTargetMetricService/Controller: custom.inflow 패키지 신규 생성
  클라이언트 메트릭 API(/manage/inflow/client/**)를 InflowTargetMetric*에서 분리
- InflowTargetMetricService/Controller: 클라이언트 관련 메서드/엔드포인트 제거
- InflowTargetBucketService: getClientDualManager() 분리 반영
- standard-message-config.properties: requestProcessor.class 경로 업데이트
- 단위 테스트: ClientInflowTargetMetric{Service,Controller}Test 추가,
  기존 테스트에서 클라이언트 케이스 분리

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/test/java/com/eactive/eai/custom/inflow/ClientInflowTargetMetricControllerTest.java

@@ -0,0 +1,144 @@
+package com.eactive.eai.custom.inflow;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.util.ReflectionTestUtils;
+
+import com.eactive.eai.manage.inflow.TargetMetricDTO;
+
+/**
+ * ClientInflowTargetMetricController 단위 테스트.
+ *
+ * <p>Spring MVC를 기동하지 않고 컨트롤러를 직접 인스턴스화하여
+ * 응답 구조(success, data, count, message)를 검증한다.
+ */
+class ClientInflowTargetMetricControllerTest {
+
+    private ClientInflowTargetMetricController controller;
+    private ClientInflowTargetMetricService mockService;
+
+    @BeforeEach
+    void setUp() {
+        controller  = new ClientInflowTargetMetricController();
+        mockService = mock(ClientInflowTargetMetricService.class);
+        ReflectionTestUtils.setField(controller, "metricService", mockService);
+    }
+
+    private TargetMetricDTO makeDTO(String targetId, String targetType,
+                                    long allowed, long rejPs, long rejTh) {
+        TargetMetricDTO dto = new TargetMetricDTO();
+        dto.setTargetId(targetId);
+        dto.setTargetType(targetType);
+        dto.setActivate(true);
+        dto.setAllowed(allowed);
+        dto.setRejectedPerSecond(rejPs);
+        dto.setRejectedThreshold(rejTh);
+        long total = allowed + rejPs + rejTh;
+        dto.setTotalRequests(total);
+        dto.setRejectRatio(total > 0 ? (double)(rejPs + rejTh) / total * 100 : 0.0);
+        return dto;
+    }
+
+    @SuppressWarnings("unchecked")
+    private Map<String, Object> body(ResponseEntity<?> response) {
+        return (Map<String, Object>) response.getBody();
+    }
+
+    // =========================================================================
+    // 단일 조회
+    // =========================================================================
+
+    @Test
+    void getClientMetric_found_successTrueAndDataPresent() {
+        TargetMetricDTO dto = makeDTO("C1", "CLIENT", 300, 50, 20);
+        when(mockService.getClientMetric("C1")).thenReturn(dto);
+
+        Map<String, Object> body = body(controller.getClientMetric("C1"));
+
+        assertEquals(Boolean.TRUE, body.get("success"));
+        assertSame(dto, body.get("data"));
+        assertFalse(body.containsKey("message"));
+    }
+
+    @Test
+    void getClientMetric_notFound_successFalseWithMessage() {
+        when(mockService.getClientMetric("GHOST")).thenReturn(null);
+
+        Map<String, Object> body = body(controller.getClientMetric("GHOST"));
+
+        assertEquals(Boolean.FALSE, body.get("success"));
+        assertTrue(body.get("message").toString().contains("GHOST"));
+    }
+
+    // =========================================================================
+    // 전체 조회
+    // =========================================================================
+
+    @Test
+    void getAllClientMetrics_returnsListAndCount() {
+        List<TargetMetricDTO> list = Arrays.asList(
+            makeDTO("C1", "CLIENT", 100, 5, 5),
+            makeDTO("C2", "CLIENT", 200, 0, 0),
+            makeDTO("C3", "CLIENT", 50,  10, 0)
+        );
+        when(mockService.getAllClientMetrics()).thenReturn(list);
+
+        Map<String, Object> body = body(controller.getAllClientMetrics());
+
+        assertEquals(Boolean.TRUE, body.get("success"));
+        assertSame(list, body.get("data"));
+        assertEquals(3, body.get("count"));
+    }
+
+    @Test
+    void getAllClientMetrics_emptyList_countZero() {
+        when(mockService.getAllClientMetrics()).thenReturn(Collections.emptyList());
+
+        Map<String, Object> body = body(controller.getAllClientMetrics());
+
+        assertEquals(Boolean.TRUE, body.get("success"));
+        assertEquals(0, body.get("count"));
+    }
+
+    // =========================================================================
+    // reset
+    // =========================================================================
+
+    @Test
+    void resetClientMetric_success_successTrueWithTargetId() {
+        when(mockService.resetClientMetric("C1")).thenReturn(true);
+
+        Map<String, Object> body = body(controller.resetClientMetric("C1"));
+
+        assertEquals(Boolean.TRUE, body.get("success"));
+        assertTrue(body.get("message").toString().contains("C1"));
+    }
+
+    @Test
+    void resetClientMetric_notFound_successFalseWithTargetId() {
+        when(mockService.resetClientMetric("GHOST")).thenReturn(false);
+
+        Map<String, Object> body = body(controller.resetClientMetric("GHOST"));
+
+        assertEquals(Boolean.FALSE, body.get("success"));
+        assertTrue(body.get("message").toString().contains("GHOST"));
+    }
+
+    @Test
+    void resetAllClientMetrics_callsDelegateOnce() {
+        doNothing().when(mockService).resetAllClientMetrics();
+
+        controller.resetAllClientMetrics();
+
+        verify(mockService, times(1)).resetAllClientMetrics();
+    }
+}