Add `description` field to the payload

Some events have additional information right at the title in parentless.

For example:

```
Loading chunk 46 failed. (error: https://vc-static-bf19cf1.gcdn.co/static/build/vc.ru/search.f28511b7f4e02dfaf1d0.min.js)
```

```
undefined is not a constructor (evaluating 'new o')
```

```
undefined is not an object (evaluating 'document.getElementsByTagName('video')[0].webkitExitFullScreen')
```

```
undefined is not a constructor (evaluating 'new n({user:t,container:u,appComponent:i,socketUrl:window.__socket_url+"m:"+t.m_hash,onChannelOpen:t=>{c(t)},isMiniMessenger:!0})')
```

You need to cut such a description and put it to the separated field `description`

未指定檔案或測試。首先定位事件 payload 的建構位置以及無父級標題的解析位置；將列出的錯誤範例作為案例，並驗證附加文字是否被移到個別的描述欄位中。

由索引模型根據 Issue 內容生成。