WxMaMediaAsyncCheckResult 已定义内部类 ResultBean 和 DetailBean，但外部类未声明对应字段，导致微信多媒体内容安全识别接口异步回调中的 result 和 detail 数据无法反序列化。

变更

• WxMaMediaAsyncCheckResult：添加 result（ResultBean）和 detail（List<DetailBean>）字段及对应 @SerializedName 注解

{
  "trace_id": "...",
  "result": { "suggest": "risky", "label": 20001 },
  "detail": [
    { "strategy": "content_model", "errcode": 0, "suggest": "risky", "label": 20006, "prob": 90 }
  ]
}

修复后上述 JSON 中的 result 和 detail 字段可通过 fromJson() 正常解析。

---

This section details on the original issue you should resolve

<issue_title>微信-小程序-多媒体内容安全识别-返回的参数缺少字段</issue_title>
<issue_description>微信多媒体内容安全识别接口返回的参数，未声明 result 和 detail 这两个属性

原始issue来自：https://gitee.com/binary/weixin-java-tools/issues/IDOMFI
参考代码如下：

/**
 * @author borisbao
 */
@Data
public class WxMaMediaAsyncCheckResult implements Serializable {
  private static final long serialVersionUID = 3928132365399916183L;

  /**
   * 任务id，用于匹配异步推送结果
   */
  @SerializedName("trace_id")
  private String traceId;

  /**
   * 综合结果
   */
  @Data
  @Builder
  @XStreamAlias("result")
  public static class ResultBean implements Serializable {
    /**
     * suggest : risky
     * label : 20001
     */
    @SerializedName("suggest")
    @XStreamAlias("suggest")
    @XStreamConverter(value = XStreamCDataConverter.class)
    private String suggest;
    @SerializedName("label")
    @XStreamAlias("label")
    @XStreamConverter(value = XStreamCDataConverter.class)
    private String label;
  }

  /**
   * 详细检测结果
   */
  @Data
  @Builder
  @XStreamAlias("detail")
  public static class DetailBean implements Serializable {
    /**
     * strategy : content_model
     * errcode : 0
     * suggest : risky
     * label : 20006
     * prob : 90
     */
    @SerializedName("strategy")
    @XStreamAlias("strategy")
    @XStreamConverter(value = XStreamCDataConverter.class)
    private String strategy;
    @SerializedName("errcode")
    @XStreamAlias("errcode")
    private Integer errcode;
    @SerializedName("suggest")
    @XStreamAlias("suggest")
    @XStreamConverter(value = XStreamCDataConverter.class)
    private String suggest;
    @SerializedName("label")
    @XStreamAlias("label")
    @XStreamConverter(value = XStreamCDataConverter.class)
    private String label;
    @SerializedName("prob")
    @XStreamAlias("prob")
    private Integer prob;
  }

  public static WxMaMediaAsyncCheckResult fromJson(String json) {
    return WxMaGsonBuilder.create().fromJson(json, WxMaMediaAsyncCheckResult.class);
  }

  public String toJson() {
    return WxMaGsonBuilder.create().toJson(this);
  }
}
```</issue_description>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

Custom agent used: 全部用中文
需要用中文，包括PR标题和分析总结过程

• Fixes 微信-小程序-多媒体内容安全识别-返回的参数缺少字段 #3881

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.