feat: 리플렉션 제거 - InflowControlManager.getGroupBucket() public 메서드 추가

groupBucketList private 필드에 리플렉션 없이 접근할 수 있도록
getGroupBucket(String groupId) public 메서드 제공.

그룹 테이블 테스트 픽스처 SQL 추가 및 InflowControlManagerTest에
getGroupBucket() 동작 검증 테스트 케이스 2개 추가.

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

src/main/java/com/eactive/eai/common/inflow/InflowControlManager.java

@@ -371,6 +371,10 @@ public class InflowControlManager implements Lifecycle, Bucket {
 		return groupIds;
 	}
 
+	public CustomGroupBucket getGroupBucket(String groupId) {
+		return groupBucketList.get(groupId);
+	}
+
 	private CustomBucket makeBucketUsingInflowVO(InflowTargetVO inflowTarget) {
 		if (InflowControlManager.isInflowTarget(inflowTarget)) {
 			LocalBucketBuilder builder = Bucket4j.builder();

src/test/java/com/eactive/eai/common/inflow/InflowControlManagerTest.java

@@ -1,7 +1,10 @@
 package com.eactive.eai.common.inflow;
 
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.domain.EntityScan;
@@ -21,21 +24,37 @@ import com.eactive.eai.data.jpa.BaseRepositoryImpl;
 @EnableJpaRepositories(repositoryBaseClass = BaseRepositoryImpl.class, basePackages = {
 		"com.eactive.eai.common.inflow" })
 @EntityScan({ "com.eactive.eai.data.entity.onl.inflow" })
-@Sql({ "/com/eactive/eai/common/inflow/init_tseaifr09.sql", "/com/eactive/eai/common/inflow/init_tseaifr11.sql" })
+@Sql({
+	"/com/eactive/eai/common/inflow/init_tseaifr09.sql",
+	"/com/eactive/eai/common/inflow/init_tseaifr11.sql",
+	"/com/eactive/eai/common/inflow/init_inflow_control_group.sql",
+	"/com/eactive/eai/common/inflow/init_inflow_control_group_mapping.sql"
+})
 class InflowControlManagerTest {
 
 	@Autowired
 	InflowControlManager inflowControlManager;
 
-	@Test
-	void testStart() throws LifecycleException {
-		// given
-
-		// when
+	@BeforeEach
+	void setUp() throws LifecycleException {
+		if (!inflowControlManager.isStarted()) {
 			inflowControlManager.start();
+		}
+	}
 
-		// then
+	@Test
+	void testStart() {
 		assertTrue(inflowControlManager.isStarted());
 	}
 
+	@Test
+	void testGetGroupBucket_existingGroup_returnsNotNull() {
+		assertNotNull(inflowControlManager.getGroupBucket("test-group-001"));
+	}
+
+	@Test
+	void testGetGroupBucket_unknownGroup_returnsNull() {
+		assertNull(inflowControlManager.getGroupBucket("non-existent-group"));
+	}
+
 }

src/test/resources/com/eactive/eai/common/inflow/init_inflow_control_group.sql

@@ -0,0 +1,2 @@
+INSERT INTO inflow_control_group (group_id, group_name, threshold, threshold_per_second, threshold_time_unit, use_yn) VALUES
+    ('test-group-001', '테스트 그룹', 100, 10, 'MIN', '1');

src/test/resources/com/eactive/eai/common/inflow/init_inflow_control_group_mapping.sql

@@ -0,0 +1,2 @@
+INSERT INTO inflow_control_group_mapping (interface_id, group_id, use_yn) VALUES
+    ('FASSFEP00000004S2', 'test-group-001', '1');