:art: #3558 【企业微信】修复会话内容存档接口获取解密的聊天数据时文件信息转换出错的问题

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/msgaudit/WxCpChatModel.java

@@ -603,7 +603,7 @@ public class WxCpChatModel implements Serializable {
     private String sdkFileId;
 
     @SerializedName("filesize")
-    private Integer fileSize;
+    private Long fileSize;
 
     /**
      * From json file.