feat: llm node add context * feature/20251219_zy: (2 commits) feat(web): forgetting engine config feat: llm node add context Signed-off-by: zhaoying <zhaoying@redbearai.com> Merged-by: zhaoying <zhaoying@redbearai.com> CR-link: https://codeup.aliyun.com/redbearai/python/redbear-mem-open/change/101