feat(workflow): add HTTP request node * feature/20251219_myh: (3 commits) feat(workflow): add HTTP request node refactor(workflow): organize knowledge base code structure and add comments fix(workflow): correct property usage in HTTP request node Signed-off-by: Eternity <1533512157@qq.com> Commented-by: Eternity <1533512157@qq.com> Reviewed-by: zhuwenhui5566@163.com <zhuwenhui5566@163.com> Merged-by: zhuwenhui5566@163.com <zhuwenhui5566@163.com> CR-link: https://codeup.aliyun.com/redbearai/python/redbear-mem-open/change/51