[docs] Update documentation for features from 2026-04-08#23

Open

github-actions[bot] wants to merge 1 commit intomainfrom

docs/update-2026-04-08-9d19f3dbd7c6509a

Commits on Apr 8, 2026

docs: update environment variables reference and extension AI model lifecycle docs

github-actions[bot]
and
Copilot
committed