[feat] create get user's university api

src/main/java/org/hankki/hankkiserver/api/user/controller/UserController.java

@@ -18,11 +18,17 @@
 public class UserController {
 
     private final UserCommandService userCommandService;
+    private final UserQueryService userQueryService;
 
     @PostMapping("/users/me/university")
     public HankkiResponse<Void> postUserUniversity(@UserId final Long userId,
                                                 @Valid @RequestBody final UserUniversityPostRequest request) {
         userCommandService.saveUserUniversity(new UserUniversityPostCommand(userId, request));
         return HankkiResponse.success(CommonSuccessCode.CREATED);
     }
+
+    @GetMapping("/users/me/university")
+    public HankkiResponse<UserUniversityFindResponse> findUserUniversity(@UserId final Long userId) {
+        return HankkiResponse.success(CommonSuccessCode.OK, userQueryService.findUserUniversity(userId));
+    }
 }

src/main/java/org/hankki/hankkiserver/api/user/service/UserQueryService.java

@@ -0,0 +1,21 @@
+package org.hankki.hankkiserver.api.user.service;
+
+import lombok.RequiredArgsConstructor;
+import org.hankki.hankkiserver.api.user.service.response.UserUniversityFindResponse;
+import org.hankki.hankkiserver.common.code.UserUniversityErrorCode;
+import org.hankki.hankkiserver.common.exception.NotFoundException;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+public class UserQueryService {
+
+    private final UserUniversityFinder userUniversityFinder;
+
+    @Transactional(readOnly = true)
+    public UserUniversityFindResponse findUserUniversity(Long userId) {
+        return UserUniversityFindResponse.of(userUniversityFinder.findByUserId(userId)
+                .orElseThrow(() -> new NotFoundException(UserUniversityErrorCode.USER_UNIVERSITY_NOT_FOUND)));
+    }
+}

src/main/java/org/hankki/hankkiserver/api/user/service/response/UserUniversityFindResponse.java

@@ -0,0 +1,13 @@
+package org.hankki.hankkiserver.api.user.service.response;
+
+import org.hankki.hankkiserver.domain.user.model.UserUniversity;
+
+public record UserUniversityFindResponse(long id,
+                                         String name,
+                                         double longitude,
+                                         double latitude) {
+    public static UserUniversityFindResponse of (UserUniversity userUniversity) {
+         return new UserUniversityFindResponse(userUniversity.getUniversityId(), userUniversity.getUniversityName(),
+                userUniversity.getLongitude(), userUniversity.getLatitude());
+    }
+}