refactor: 피드 Get Method Parameter Validation 코드 리팩토링 (#211)

src/main/java/com/depromeet/stonebed/domain/feed/api/FeedController.java

@@ -5,6 +5,7 @@
 import com.depromeet.stonebed.domain.feed.dto.response.FeedGetResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.*;
 
@@ -17,11 +18,7 @@ public class FeedController {
 
     @Operation(summary = "피드 조회", description = "내 피드를 조회하는 API입니다.")
     @GetMapping
-    public FeedGetResponse getFeed(
-            @RequestParam(required = false) String cursor,
-            @RequestParam(required = false) Long memberId,
-            @RequestParam int limit) {
-        FeedGetRequest request = new FeedGetRequest(cursor, memberId, limit);
+    public FeedGetResponse getFeed(@Valid FeedGetRequest request) {
         return feedService.getFeed(request);
     }
 }

src/main/java/com/depromeet/stonebed/domain/feed/dto/request/FeedGetRequest.java

@@ -1,8 +1,10 @@
 package com.depromeet.stonebed.domain.feed.dto.request;
 
 import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.Max;
+import jakarta.validation.constraints.Min;
 
 public record FeedGetRequest(
         @Schema(description = "커서 위치", example = "1") String cursor,
-        @Schema(description = "작성자 ID", example = "1") Long memberId,
-        @Schema(description = "피드 당 항목 수", example = "5") int limit) {}
+        @Schema(description = "작성자 ID", example = "1") @Min(1) Long memberId,
+        @Schema(description = "피드 당 항목 수", example = "5") @Min(1) @Max(50) int limit) {}