docs: add memory quality,forgetting and lifecycle RFC - #1652

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: jdx/mise-action@c37c93293d6b742fc901e1406b8f764f6fb19dac. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/