Long term storage of transaction status data

## Long term storage of transaction status data

### Description:
- Transaction session and undo_log are important status data of Seata, and long-term persistent storage of data is of great significance for data analysis.

### Tasks:
- send the transaction session and undolog recorded by the transaction event to the messaging middleware.
- consume transaction session and undolog messages, according to a certain data structure stored in NoSQL.

### Difficulty
- Advance

### Mentor
- ChengHui Zhang (@objcoding , [zhangchenghui.dev@gmail.com](mailto:zhangchenghui.dev@gmail.com)), ASoC Mentor, committer of Seata.

### Programming language:
- Java

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## 事务状态数据的长效存储

### 描述：
- 事务session和undolog 是Seata 重要的状态数据，数据的长时间持久化存储对于数据的分析有重要的意义。

### 任务：
- 将事务event记录的事务session和undolog发送至消息中间件。
- 消费事务session和undolog的消息，按照一定的数据结构存储到NoSQL中。

### 难度
- 进阶

### 导师
- ChengHui Zhang (@objcoding , [zhangchenghui.dev@gmail.com](mailto:zhangchenghui.dev@gmail.com)), ASoC Mentor, committer of Seata.

### 编程语言：
- Java

Start by tracing where transaction events record the transaction session and undo_log, then identify the project's messaging middleware and NoSQL integration points. Define the message data structure and persistence expectations with the mentor; done means both data types are published, consumed, and stored for long-term analysis.

Written by the indexing model from the issue text.