Smoke tests only ran astro dev, which uses Vite's on-demand compilation
and never invokes the adapter build pipeline. Build failures in
cloudflare/playground demos (or any adapter-dependent site) passed CI
undetected. Add a build verification suite that runs astro build for
every site in the matrix before the existing runtime tests.
Bumps smoke test CI timeout from 15 to 30 minutes to accommodate.
* refactor: split smoke and integration test configs into separate CI jobs
* fix: move CLA labeling from triage to CLA workflow
* fix: install formatters in temp dir to avoid catalog: protocol error
* fix: handle 404 when removing labels that don't exist on the PR
Add a rollup job that gates on all 8 E2E shards so it can be a single
required check. Exempt emdashbot from PR template validation alongside
dependabot and renovate.
