♻️ RoomCreatedPayload Integer -> int로 통일

Author: LimKangHyun

backend/src/main/java/io/f1/backend/domain/game/sse/dto/RoomCreatedPayload.java

@@ -1,14 +1,17 @@
 package io.f1.backend.domain.game.sse.dto;
 
 public record RoomCreatedPayload(
-        Long roomId,
-        String roomName,
-        Integer maxUserCount,
-        int currentUserCount,
-        boolean locked,
-        String roomState,
-        String quizTitle,
-        String description,
-        String creator,
-        Integer numberOfQuestion,
-        String thumbnailUrl) {}
+    Long roomId,
+    String roomName,
+    int maxUserCount,
+    int currentUserCount,
+    boolean locked,
+    String roomState,
+    String quizTitle,
+    String description,
+    String creator,
+    int numberOfQuestion,
+    String thumbnailUrl
+) {
+
+}