Summary

What changed

The CI pipeline had a build + validate structure where lint, formatting, and test failures were only surfaced after waiting 20+ minutes for the build to complete. This restructures the pipeline into three explicit phases.

New job topology

pre-build ───────────────────────────────► build ──────────────────────► post-build
  CRLF check                                 │                               Workers tests (require dist/)
  invalid file extension check               │                               link validation
  type check (check + check:worker)          │
  eslint (reviewdog)                         ├──────────────────────────► publish-preview
  format check                               │
  redirect validation                        └──────────────────────────► notify
  Node + Astro tests

Changes at a glance

• pre-build (new): All fast validation steps that do not require a built dist/ move here — CRLF check, file extension check, type checking, ESLint, format check, redirect validation, and Node/Astro tests (test:prebuild). Failures surface in ~2-3 minutes instead of after the full build.
• build: Now needs: pre-build. Stripped of all steps moved to pre-build — responsible only for running npm run build and uploading the dist/ artifact.
• post-build (renamed from validate): Runs after build. Downloads the dist/ artifact, runs the Workers test suite (test:postbuild) which requires dist/ to exist, then surfaces any link validation failures.
• notify: Updated needs to [pre-build, build, post-build] and job name filters updated to match new names.
• compile: Untouched (pending separate removal).
• publish-preview: Untouched.

Why tests are split

The Workers vitest pool reads wrangler.toml at startup, which specifies assets.directory = "./dist". Running all tests in pre-build caused an immediate crash since dist/ doesn't exist yet. Two scripts were added to package.json — test:prebuild (Node + Astro suites) and test:postbuild (Workers suite) — to split them across the appropriate phases.