feat: reorganization code for product_server.py and product

[fridayL]

Pre-submission checklist | 提交前检查

• I have searched existing issues and this hasn't been mentioned before | 我已搜索现有问题，确认此问题尚未被提及
• I have read the project documentation and confirmed this issue doesn't already exist | 我已阅读项目文档并确认此问题尚未存在
• This issue is specific to MemOS and not a general software issue | 该问题是针对 MemOS 的，而不是一般软件问题

Problem Statement | 问题陈述

MemOS/src/memos/mem_os/product_server.py
MemOS/src/memos/mem_os/product.py
have too much dup code, need reorganization code and rm dup code
for pr #366

Willingness to Implement | 实现意愿

• I'm willing to implement this myself | 我愿意自己解决
• I would like someone else to implement this | 我希望其他人来解决

[github-actions]

This issue has been automatically marked as stale due to inactivity.

[github-actions]

This issue has been automatically closed due to inactivity.