Summary:
Add reviewed bilingual release notes for the 1.17.18 stable release.

Source:
Cover the merged pull requests between v1.17.17 and the 03cc7749 release candidate, including Remote Workbench, Auto Guard, MCP authorization, desktop file preview, updater recovery, and session safety.

Verification:
- node scripts/release-notes.mjs validate
- node --test scripts/release-notes.test.mjs
- node scripts/release-notes.mjs render --version 1.17.18 --output /tmp/reasonix-release-notes-1.17.18.md
- git diff --check