fix(cloudflare): replace deploy prerendering with prewarming

[james-elicx]

Summary

• stop local prerendering and direct KV bulk uploads during Cloudflare Worker deploys
• direct prerender users to the staged Worker CDN pre-warming path while preserving output: export
• remove prerender generation and prompting from Cloudflare init while keeping Node init support and preserving existing user config

Builds on the deployed KV pre-warming support from #3324.

Validation

• vp test run tests/deploy-prerender-config.test.ts tests/deploy.test.ts tests/init-platform.test.ts tests/init.test.ts tests/init-cloudflare.test.ts (577 passed)
• vp check on all changed source and test files
• vp run vinext#build
• vp run @vinext/cloudflare#build
• vp run knip
• git diff --check

[pkg-pr-new]

Open in StackBlitz

@vinext/cloudflare

npm i https://pkg.pr.new/@vinext/cloudflare@3340

create-vinext-app

npm i https://pkg.pr.new/create-vinext-app@3340

@vinext/types

npm i https://pkg.pr.new/@vinext/types@3340

vinext

npm i https://pkg.pr.new/vinext@3340

@cloudflare/workers-response-store

npm i https://pkg.pr.new/@cloudflare/workers-response-store@3340

commit: f2e063e

[github-actions]

Example	Preview	Production	Original
app-router-cloudflare	preview	production
pages-router-cloudflare	preview	production
app-router-playground	preview	production	original
realworld-api-rest	preview	production
nextra-docs-template	preview	production
benchmarks	preview	production
hackernews	preview	production	original
response-store-demo	preview	production
workers-cache	preview	production
kv	preview	production
static-export	preview	production
web	preview	production

[github-actions]

Performance benchmarks

Compared f2e063e against base 1979d9c using alternating same-runner rounds. Next.js was unchanged and skipped.

0 improved · 0 regressed · 6 within ±1.5%

Scenario	Framework	Baseline	Current	Change
Client bundle size (gzip)	vinext	142.3 KB	142.3 KB	⚫ -0.0%
Client entry size (gzip)	vinext	130.4 KB	130.4 KB	⚫ -0.0%
Dev server cold start	vinext	3.34 s	3.30 s	⚫ -1.3%
Production build time	vinext	3.91 s	3.90 s	⚫ -0.3%
RSC entry closure size (gzip)	vinext	128.2 KB	128.2 KB	⚫ -0.0%
Server bundle size (gzip)	vinext	226.8 KB	226.8 KB	⚫ -0.0%

View detailed results and traces

_{🟢 improvement · 🔴 regression · ⚫ change below 1.5% · paired base/head}