feat: 아이템 세공 정보 테이블 생성 및 조회 API 구현

src/main/java/until/the/eternity/metalwareinfo/application/service/MetalwareInfoService.java

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+package until.the.eternity.metalwareinfo.application.service;
+
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import until.the.eternity.metalwareinfo.domain.repository.MetalwareInfoRepositoryPort;
+import until.the.eternity.metalwareinfo.interfaces.rest.dto.response.MetalwareInfoResponse;
+
+@Service
+@Transactional(readOnly = true)
+@RequiredArgsConstructor
+public class MetalwareInfoService {
+
+    private final MetalwareInfoRepositoryPort metalwareInfoRepository;
+
+    public List<MetalwareInfoResponse> findAll() {
+        List<String> metalwares = metalwareInfoRepository.findAllMetalwares();
+        return MetalwareInfoResponse.from(metalwares);
+    }
+}

src/main/java/until/the/eternity/metalwareinfo/domain/repository/MetalwareInfoRepositoryPort.java

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+package until.the.eternity.metalwareinfo.domain.repository;
+
+import java.util.List;
+
+public interface MetalwareInfoRepositoryPort {
+    List<String> findAllMetalwares();
+}

src/main/java/until/the/eternity/metalwareinfo/infrastructure/persistence/MetalwareInfoEntity.java

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+package until.the.eternity.metalwareinfo.infrastructure.persistence;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Table(name = "metalware_info")
+@Getter
+@NoArgsConstructor
+public class MetalwareInfoEntity {
+
+    @Id
+    @Column(name = "metalware", nullable = false, length = 50)
+    private String metalware;
+}

src/main/java/until/the/eternity/metalwareinfo/infrastructure/persistence/MetalwareInfoJpaRepository.java

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+package until.the.eternity.metalwareinfo.infrastructure.persistence;
+
+import java.util.List;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+
+public interface MetalwareInfoJpaRepository extends JpaRepository<MetalwareInfoEntity, String> {
+
+    @Query("SELECT m.metalware FROM MetalwareInfoEntity m")
+    List<String> findAllMetalwares();
+}

src/main/java/until/the/eternity/metalwareinfo/infrastructure/persistence/MetalwareInfoRepositoryPortImpl.java

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+package until.the.eternity.metalwareinfo.infrastructure.persistence;
+
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+import until.the.eternity.metalwareinfo.domain.repository.MetalwareInfoRepositoryPort;
+
+@Repository
+@RequiredArgsConstructor
+public class MetalwareInfoRepositoryPortImpl implements MetalwareInfoRepositoryPort {
+    private final MetalwareInfoJpaRepository jpaRepository;
+
+    @Override
+    public List<String> findAllMetalwares() {
+        return jpaRepository.findAllMetalwares();
+    }
+}

src/main/java/until/the/eternity/metalwareinfo/interfaces/rest/controller/MetalwareInfoController.java

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+package until.the.eternity.metalwareinfo.interfaces.rest.controller;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import until.the.eternity.metalwareinfo.application.service.MetalwareInfoService;
+import until.the.eternity.metalwareinfo.interfaces.rest.dto.response.MetalwareInfoResponse;
+
+@RestController
+@RequestMapping("/api/metalware-infos")
+@RequiredArgsConstructor
+@Tag(name = "Metalware Info", description = "세공 정보 조회 API")
+public class MetalwareInfoController {
+
+    private final MetalwareInfoService metalwareInfoService;
+
+    // TODO: 세공 레벨별 능력치, 최대 레벨, 한계 돌파 최대 레벨은 수기로 추가 후 조회 시 사용
+    @Operation(summary = "모든 세공 정보 조회", description = "시스템에 저장된 모든 세공 정보를 조회합니다.")
+    @GetMapping
+    public List<MetalwareInfoResponse> getAllMetalwareInfos() {
+        return metalwareInfoService.findAll();
+    }
+}

src/main/java/until/the/eternity/metalwareinfo/interfaces/rest/dto/response/MetalwareInfoResponse.java

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+package until.the.eternity.metalwareinfo.interfaces.rest.dto.response;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import java.util.List;
+import java.util.stream.Collectors;
+import lombok.Builder;
+
+@Builder
+@Schema(description = "세공 정보 응답 DTO")
+public record MetalwareInfoResponse(
+        @Schema(description = "세공", example = "불의 연성술") String metalware) {
+    public static MetalwareInfoResponse from(String metalware) {
+        return MetalwareInfoResponse.builder().metalware(metalware).build();
+    }
+
+    public static List<MetalwareInfoResponse> from(List<String> metalwares) {
+        return metalwares.stream().map(MetalwareInfoResponse::from).collect(Collectors.toList());
+    }
+}

src/main/resources/db/migration/R__insert_item_info.sql

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+delete from item_info;
+INSERT INTO item_info (name, top_category, sub_category)
+select distinct item_name, item_top_category, item_sub_category from auction_history;

src/main/resources/db/migration/R__insert_item_option_value_info.sql

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+delete from item_option_value_info;
+insert into item_option_value_info (option_type, option_sub_type, option_value, option_value2, option_desc)
+select distinct option_type, option_sub_type, option_value, option_value2, option_desc from auction_item_option;

src/main/resources/db/migration/R__insert_metalware_info_table.sql

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+delete from metalware_info;
+insert into metalware_info (metalware)
+select distinct regexp_replace(regexp_substr(option_value, ' ?[^\(]+'), ' ?[0-9][0-9]? ?레벨', '') as metalware
+from auction_item_option
+where option_type = '세공 옵션';

src/main/resources/db/migration/V9__create_metalware_info_table.sql

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+create table metalware_info
+(
+    metalware   VARCHAR(50) not null primary key comment '세공',
+    level_attribute VARCHAR(50) comment '레벨별 능력치 효과',
+    max_level TINYINT comment '레벨 최대 수치',
+    limit_break_level TINYINT comment '한계 돌파 레벨 최대 수치'
+)
+    comment '세공 정보 테이블';
+
+-- 데이터 적재 쿼리
+--insert into metalware_info (metalware)
+--select distinct regexp_replace(regexp_substr(option_value, ' ?[^\(]+'), ' ?[0-9][0-9]? ?레벨', '') as metalware
+--from auction_item_option
+--where option_type = '세공 옵션';

src/test/java/until/the/eternity/metalwareinfo/application/service/MetalwareInfoServiceTest.java

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+package until.the.eternity.metalwareinfo.application.service;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.*;
+
+import java.util.List;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import until.the.eternity.metalwareinfo.domain.repository.MetalwareInfoRepositoryPort;
+import until.the.eternity.metalwareinfo.interfaces.rest.dto.response.MetalwareInfoResponse;
+
+@ExtendWith(MockitoExtension.class)
+class MetalwareInfoServiceTest {
+
+    @Mock private MetalwareInfoRepositoryPort repositoryPort;
+
+    @InjectMocks private MetalwareInfoService service;
+
+    @Test
+    @DisplayName("모든 세공 정보를 조회하면 세공 목록을 반환한다")
+    void findAll_should_return_all_metalwares() {
+        // given
+        List<String> metalwares = List.of("불의 연성술", "물의 연성술", "바람의 연성술");
+        when(repositoryPort.findAllMetalwares()).thenReturn(metalwares);
+
+        // when
+        List<MetalwareInfoResponse> result = service.findAll();
+
+        // then
+        assertThat(result).hasSize(3);
+        assertThat(result.get(0).metalware()).isEqualTo("불의 연성술");
+        assertThat(result.get(1).metalware()).isEqualTo("물의 연성술");
+        assertThat(result.get(2).metalware()).isEqualTo("바람의 연성술");
+        verify(repositoryPort).findAllMetalwares();
+    }
+
+    @Test
+    @DisplayName("세공 정보가 없으면 빈 목록을 반환한다")
+    void findAll_should_return_empty_list_when_no_data() {
+        // given
+        when(repositoryPort.findAllMetalwares()).thenReturn(List.of());
+
+        // when
+        List<MetalwareInfoResponse> result = service.findAll();
+
+        // then
+        assertThat(result).isEmpty();
+        verify(repositoryPort).findAllMetalwares();
+    }
+}