[FEATURE]: 输出elastic的版本，兼容到7.9

[joey-ccb]

Concisely describe the proposed feature
A clear and concise description of what you want. For example,

The log format collected to Kafka is not friendly to subsequent processing

Describe the solution you'd like (if any)
A clear and concise description of what you want to achieve and implement. For example,

I would like to add an log flush method for flusher_kafka.

Additional comments
Add any other context or screenshots about the feature request here.
For example, the ideal input and output logs.

The logs are supposed to have the following contents, e.g.,

{"_target_":"127.0.0.1","_field_":"DISMAN-EXPRESSION-MIB::sysUpTimeInstance","_oid_":".1.3.6.1.2.1.1.3.0","_type_":"TimeTicks","_content_":"10423593"}

[messixukejia]

请问，是否方便参与共建支持这个功能？

[joey-ccb]

期待参与共建支持这个功能. 我如何参与? 在 2023-06-04 17:48:25，"徐可甲" ***@***.***> 写道： 请问，是否方便参与共建支持这个功能？ — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you authored the thread.Message ID: ***@***.***>

[messixukejia]

可以先给个设计文档，设计文档可以放到 https://github.com/alibaba/ilogtail/discussions/categories/ideas