test(ci): deterministic deploy gate + advisory quality suite; sync README versions

The deploy gate ran e2e specs that depend on live content and data, so a missing
upload (the /help article images) or a legacy malformed avatar figure could turn
a safe code deploy red. Split the suites by what they actually guarantee:

- Blocking gate (`pnpm test:e2e`, `playwright.config.ts`): only checks the CMS
  can guarantee itself — anonymous redirects, register form fields, the captcha
  DOM contract and the cache-control headers (deterministic origin-direct).
- Advisory suite (`pnpm test:e2e:quality`, `playwright.quality.config.ts`):
  broken images, layout overflow and warm-page latency, which depend on live
  content/upload state and the host. It runs as a `continue-on-error` CI job
  against the public site so a real content problem stays visible without
  blocking the pipeline.

Also add `scripts/sync-readme-versions.mjs` (+ tests, docs and a CI check) so
the pinned versions in README.md can never drift from package.json / .nvmrc.

package.json

@@ -11,6 +11,8 @@
 		"build": "pnpm assets:editor && bash scripts/with-memory-cap.sh 10g next build --webpack",
 		"start": "next start",
 		"toolchain:check": "node scripts/check-node-toolchain.mjs",
+		"readme:versions": "node scripts/sync-readme-versions.mjs",
+		"readme:versions:check": "node scripts/sync-readme-versions.mjs --check",
 		"lint": "biome check .",
 		"biome:lint": "biome check .",
 		"format": "biome format --write .",
@@ -42,6 +44,7 @@
 		"test:ui:update": "bash scripts/with-memory-cap.sh 8g playwright test --config playwright.ui.config.ts --update-snapshots",
 		"test:imaging": "bash scripts/with-memory-cap.sh 8g playwright test --config playwright.imaging.config.ts",
 		"test:imaging:update": "bash scripts/with-memory-cap.sh 8g playwright test --config playwright.imaging.config.ts --update-snapshots",
+		"test:e2e:quality": "bash scripts/with-memory-cap.sh 8g playwright test --config playwright.quality.config.ts",
 		"performance:report": "node scripts/performance-report.mjs",
 		"test:integration": "bash scripts/with-memory-cap.sh 8g vitest run --config vitest.integration.config.ts"
 	},