ci: bump registry-bridge action to content-addressed tarball URLs

[fengmk2]

Points the preview-build action at pkg-pr-registry-bridge#58 (a83d8aa, merged + deployed), which makes preview tarballs content-addressed:

• uploads to /-/tarball/<name>/<version>/<shasum>.tgz
• dist.tarball = /tarballs/<name>/<version>/<shasum>.tgz

This fixes the ERR_PNPM_TARBALL_INTEGRITY a non-byte-reproducible rebuild of the same commit could cause: each build gets its own URL, so a republish can never cross bytes and integrity. The bridge is already deployed and back-compat (existing version-addressed previews still install via a revalidatable fallback), so this just activates the new upload path for future preview builds.

Add the preview-build label to smoke-test a labeled build against the deployed bridge.

[netlify]

✅ Deploy Preview for viteplus-preview canceled.

Name	Link
🔨 Latest commit	eaddff8
🔍 Latest deploy log	https://app.netlify.com/projects/viteplus-preview/deploys/6a4e7f2b14a3180008cb6f8b

[github-actions]

Registry bridge build (eaddff8)

This commit build is published to the registry bridge, which serves these as ordinary npm versions (every other package proxies to npmjs):

Package	Version
vite-plus	0.0.0-commit.eaddff82ebc2d119734e91bf72a40b696e21c329
@voidzero-dev/vite-plus-core	0.0.0-commit.eaddff82ebc2d119734e91bf72a40b696e21c329

Install the Vite+ CLI built from this commit, then migrate a project:

# macOS / Linux
curl -fsSL https://vite.plus | VP_PR_VERSION=2100 bash

# Windows (PowerShell)
$env:VP_PR_VERSION="2100"; irm https://vite.plus/ps1 | iex

After installing, upgrade the current project's vite-plus to this test build with:

vp migrate

Or point your package manager at the bridge registry https://registry-bridge.viteplus.dev/:

Package manager	Registry config
npm / pnpm / Bun	.npmrc: registry=https://registry-bridge.viteplus.dev/
Yarn (v2+)	.yarnrc.yml: npmRegistryServer: "https://registry-bridge.viteplus.dev/"

Then pin the build (vite aliases to vite-plus-core; pnpm can use a catalog, npm an overrides entry):

{
  "devDependencies": {
    "vite-plus": "0.0.0-commit.eaddff82ebc2d119734e91bf72a40b696e21c329",
    "vite": "npm:@voidzero-dev/vite-plus-core@0.0.0-commit.eaddff82ebc2d119734e91bf72a40b696e21c329"
  }
}

[github-actions]

🐳 Docker preview image

Built from this PR's registry bridge build:

Image	Compressed size
ghcr.io/voidzero-dev/vite-plus:pr-2100	240MB

# remove any stale local copy from a previous run, then pull fresh
docker rmi ghcr.io/voidzero-dev/vite-plus:pr-2100 2>/dev/null; docker pull ghcr.io/voidzero-dev/vite-plus:pr-2100

Quick check:

docker run --rm ghcr.io/voidzero-dev/vite-plus:pr-2100 vp --version

See docs/guide/docker.md for usage.