task（消息队列任务表）
| Name | Type | Relation With | Description |
|---|---|---|---|
| type | Enumeration | 功能分类：domain | dns | sms | email 等 | |
| queueName | Text(short text) | 消息队列名称 | |
| taskName | Text(short text) | 任务名称 | |
| request | JSON | 任务参数 | |
| taskStatus | Enumeration | pending | resolve | reject | |
| response | JSON | 任务结果（无论成功与否都要保存结果） | |
| user | Relation | User | |
| operand | Text(short text) | 操作对象。对于域名来说就是域名；对于短息来说就是手机号 |