♻️ refactor: 버전 로직 생성

src/main/java/foregg/foreggserver/controller/VersionController.java

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+package foregg.foreggserver.controller;
+
+import foregg.foreggserver.apiPayload.ApiResponse;
+import foregg.foreggserver.service.versionService.VersionQueryService;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/version")
+@Tag(name = "앱 버전 추출 API")
+public class VersionController {
+
+    private final VersionQueryService versionQueryService;
+
+    @GetMapping("")
+    public ApiResponse<String> getAppVersion() {
+        return ApiResponse.onSuccess(versionQueryService.getAppVersion());
+    }
+
+}

src/main/java/foregg/foreggserver/domain/Version.java

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+package foregg.foreggserver.domain;
+
+import foregg.foreggserver.domain.common.BaseEntity;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class Version extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private String version;
+
+}

src/main/java/foregg/foreggserver/repository/VersionRepository.java

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+package foregg.foreggserver.repository;
+
+import foregg.foreggserver.domain.Version;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+public interface VersionRepository extends JpaRepository<Version, Long> {
+
+    Optional<Version> findById(Long id);
+
+}

src/main/java/foregg/foreggserver/service/versionService/VersionQueryService.java

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+package foregg.foreggserver.service.versionService;
+
+import foregg.foreggserver.domain.Version;
+import foregg.foreggserver.repository.VersionRepository;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Optional;
+
+@RequiredArgsConstructor
+@Service
+@Transactional(readOnly = true)
+@Slf4j
+public class VersionQueryService {
+
+    private final VersionRepository versionRepository;
+
+    public String getAppVersion() {
+        Optional<Version> foundVersion = versionRepository.findById(1L);
+        return foundVersion.get().getVersion();
+    }
+}