Validation only: coordinated dependency updates

Draft
HA
12d ago
+686-704

Validation only; do not merge.

This branch contains exactly the dependency code in #251 plus one temporary workflow. It runs pnpm check, pnpm security:audit, and pnpm verify:architecture sequentially on an isolated GitHub-hosted runner because the shared local host has produced timing-sensitive failures under concurrent test load. No assertions, timeouts, or integration gates are relaxed. This PR will be closed after evidence is collected; the temporary workflow will not enter main.


Summary by cubic

Validation-only branch for the coordinated dependency updates from #251; do not merge. It adds one temporary workflow that runs pnpm check, pnpm security:audit, and pnpm verify:architecture sequentially on an isolated GitHub-hosted runner, because the shared local host produces timing-sensitive failures under concurrent test load. This PR will be closed after evidence is collected, and the temporary workflow will not enter main. No assertions, timeouts, or integration gates are relaxed.