dubbo version: 3.1.7, 异步调用 异常

dubbo version: 3.1.7,

```
public R test( ) throws ExecutionException, InterruptedException {

CompletableFuture future = RpcContext.getServiceContext().asyncCall(
() -> {
return asyncService.sayHello("oneway call request1");
}
);

return toAjax(future.get() != null);

}

Caused by: java.lang.IllegalArgumentException: [Serialization Security] Serialized class java.util.concurrent.CompletableFuture has not implement Serializable interface. Current mode is strict check, will disallow to deserialize it by default.
at org.apache.dubbo.common.utils.DefaultSerializeClassChecker.loadClass(DefaultSerializeClassChecker.java:112)
at org.apache.dubbo.common.serialize.hessian2.Hessian2SerializerFactory.getDefaultSerializer(Hessian2SerializerFactory.java:49)
at com.alibaba.com.caucho.hessian.io.SerializerFactory.getSerializer(SerializerFactory.java:393)
at com.alibaba.com.caucho.hessian.io.Hessian2Output.writeObject(Hessian2Output.java:411)
at com.alibaba.com.caucho.hessian.io.JavaSerializer$FieldSerializer.serialize(JavaSerializer.java:302)
... 12 common frames omitted

```

Start with the reported RpcContext.getServiceContext().asyncCall usage and the CompletableFuture serialization exception. Read DefaultSerializeClassChecker.java and Hessian2SerializerFactory.java to trace the failure, then establish whether the documented async-call behavior and serialization handling match the expected result.

Written by the indexing model from the issue text.