[Feature]: keep project data after delete agent record

[quericy]

Preflight Checklist

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for an issue that matches the one I want to file, without success.

Problem Description

在web控制台-Agent管理中，删除agent后，会删除agent相关的流量、调用链记录

Proposed Solution

期望能仅清理agent的相关数据，但保留流量调用链等归属于项目相关的数据

Alternatives Considered

No response

Additional Information

agent本身只是上报数据的入口，上报的数据是归属这个项目的，删除和agent相关的数据时，不应该清理项目下的漏洞、调用链、流量这样的数据