fix : FindingGameWinner 복합키 타입 오류 수정 (CC-112) (#12)

* feat : ERD 토대로 Entity class 작성 (CC-112)

* fix : Entity column중 PK field는 Wrapper class 사용 (CC-112)

* fix : Entity간의 관계 설정 (CC-112)

* fix : FindingGameWinner 복합키 타입 오류 수정 (CC-112)

src/main/java/ai/softeer/caecae/findinggame/domain/entity/FindingGameWinnerId.java

@@ -1,13 +1,15 @@
 package ai.softeer.caecae.findinggame.domain.entity;
 
+import ai.softeer.caecae.user.domain.entity.User;
+
 import java.io.Serializable;
 
 public class FindingGameWinnerId implements Serializable {
-    private Integer userId;
-    private Integer findingGameId;
+    private User user;
+    private FindingGame findingGame;
 
-    public FindingGameWinnerId(Integer userId, Integer findingGameId) {
-        this.userId = userId;
-        this.findingGameId = findingGameId;
+    public FindingGameWinnerId(User user, FindingGame findingGame) {
+        this.user = user;
+        this.findingGame = findingGame;
     }
-}
+}