feat: Add SummarizationController (#7)

src/main/java/com/beotkkot/qtudy/controller/post/SummarizationController.java

@@ -0,0 +1,28 @@
+package com.beotkkot.qtudy.controller.post;
+
+import com.beotkkot.qtudy.dto.response.posts.GetSummaryResponseDto;
+import com.beotkkot.qtudy.service.posts.PostsService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+@Slf4j
+@RestController
+@RequiredArgsConstructor
+public class SummarizationController {
+
+    private final PostsService postsService;
+
+    /**
+     * 사용자가 작성한 글에 대해 AI가 요약한 내용을 반환한다.
+     */
+    @GetMapping("summary/{postId}")
+    public ResponseEntity<? super GetSummaryResponseDto> summary(@PathVariable("postId") Long postId) {
+        // 포스트 아이디로부터 포스트 얻어오기
+        ResponseEntity<? super GetSummaryResponseDto> response = postsService.getSummary(postId);
+        return response;
+    }
+}