* ci: address zizmor security audit findings
Run `zizmor .` and address all findings:
- Pin actions to commit SHAs with version comments (unpinned-uses).
Dependabot picks up the version comment for future bumps.
- Move `contents: write` / `id-token: write` to the publish job in
publish.yml; set `permissions: {}` at the workflow level
(excessive-permissions).
- Add `permissions: {}` to deploy-examples.yml workflow + scope
smoke-test job to `contents: read` (excessive-permissions).
- Move `${{ ... }}` expansions inside run blocks into `env:` vars
in publish.yml / benchmarks.yml / nextjs-deploy-suite.yml
(template-injection).
- Set `persist-credentials: false` on all checkouts that don't push;
publish.yml needs them for `git push origin v$VERSION`, so it
carries an inline `zizmor: ignore[artipacked]` instead.
- Keep dependabot's 1-day cooldown but annotate with `zizmor: ignore`
(intentional fast cooldown).
`zizmor .` is now clean.
* ci: add zizmor GitHub Actions workflow
Run zizmor on every push to main and every PR via the upstream
`zizmorcore/zizmor-action`. Findings surface in the GitHub Code
Scanning UI (Security → Code scanning alerts).
* ci(publish): explain zizmor artipacked ignore
* chore: bump pnpm to 10.32.1 and enable vitest agent reporter
* chore: upgrade GitHub Actions to Node 24 compatible versions
* perf: re-land unit/integration split and add CI sharding
- Restore unit/integration vitest project split (lost in vp migration)
- vitest 4 supports fileParallelism per-project (was global-only in v3),
so unit tests now run in parallel (~11s) while integration stays serial
- Add 3-shard matrix for integration tests in CI, cutting wall time from
~4.5min to ~1.5min
- Move kv-cache-handler to integration to avoid flakiness under parallelism
* chore: remove unused deploy-preview slash command workflow
* ci: add sentinel job for stable branch protection rule