Added the notification channel surface to the external-streams branch. - #25

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Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5, actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065, actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02, arduino/setup-protoc@c65c819552d16ad3c9b72d9dfd5ba5237b9c906b. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Restore cache failed: Dependencies file is not found in /home/runner/work/sdk-python/sdk-python. Supported file pattern: go.sum