ci: add verification step to CI workflow (#497)

* ci: add verification step to CI workflow

Runs `yarn verify` in CI to catch regressions in verified functions.
Only functions with `verified: X.Y` header are tested, ensuring CI
doesn't fail on unverified functions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* ci: use Node 22.x for TypeScript strip-types support

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: kvz

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
           fetch-depth: 1
       - uses: actions/setup-node@v4
         with:
-          node-version: 20.x
+          node-version: 22.x
           registry-url: 'https://registry.npmjs.org'
       - name: Get yarn cache directory path
         id: yarn-cache-dir-path
@@ -44,6 +44,9 @@ jobs:
       - name: Test
         run: |
           corepack yarn test
+      - name: Verify against native runtimes
+        run: |
+          corepack yarn verify
       - name: Release
         if: startsWith(github.ref, 'refs/tags/')
         run: |