feat(knowledgeBase): add media dataset support and improve file handling * feature/20251219_yjp: (1 commits) feat(knowledgeBase): add media dataset support and improve file handling Signed-off-by: vrhs@163.com <accounts_660b6454a0eb398d3f8d2c76@mail.teambition.com> Merged-by: vrhs@163.com <accounts_660b6454a0eb398d3f8d2c76@mail.teambition.com> CR-link: https://codeup.aliyun.com/redbearai/python/redbear-mem-open/change/64