fix: type casting error

타입 변환 문제 해결

Author: kss123456789

websocket-service/src/main/java/com/oneul_tanda/websocket_service/infrastructure/websocket/AuthHandshakeInterceptor.java

@@ -20,7 +20,7 @@ public boolean beforeHandshake(
             Map<String, Object> attributes) {
 
         // 헤더에서 x-userid, x-username, chatRoomId 추출
-        UUID userId = UUID.fromString(request.getHeaders().getFirst("X-User-ID"));
+        String userId = request.getHeaders().getFirst("X-User-ID");
 
         if (userId != null) {
             attributes.put("userId", userId);