feat(sdk): implement searchByMemo, canonical dedup keys, request caching, and load testing suite (#612, #614, #982, #1131) - #1202

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/github-script@v7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/