### Pre-submission checklist | 提交前检查 - [x] 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 - [x] 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 - [x] 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 add delete_node_by_mem_cube_id && recover_memory_by_mem_kube_id for polardb && neo4j ### Willingness to Implement | 实现意愿 - [x] 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