docs(cloudflare): explain cached response entrypoint

[james-elicx]

Part 15 of 16 in the staged CDN adapter stack. Depends on #3158.

Summary

• documents the generated uncached gateway and cache-enabled response entrypoint
• removes the obsolete source-level cache.enabled setting from the Workers Cache example
• explains transport-key isolation from zone Cache Rules and how to inspect cache behavior

Validation

• workers-cache example production build
• formatting and diff checks
• cumulative exact-tip changed-test sweep: 3,461 passed, 2 skipped

Review size

• Implementation: +6 / -3 LOC
• Tests and fixtures: +0 / -0 LOC
• Other (docs, config, lockfile): +79 / -84 LOC
• 7 changed files

Measured against codex/cdn-v2-cache-tags after rebasing onto main@a6931c0.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@vinext/cloudflare@3154

npm i https://pkg.pr.new/create-vinext-app@3154

npm i https://pkg.pr.new/@vinext/types@3154

npm i https://pkg.pr.new/vinext@3154

commit: 8f09eb5

[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
workers-cache	preview	production
static-export	preview	production
web	preview	production

[github-actions]

Performance benchmarks

Compared 8f09eb5 against base f141e84 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	142.4 KB	142.4 KB	⚫ +0.0%
Client entry size (gzip)	vinext	129.6 KB	129.6 KB	⚫ 0.0%
Dev server cold start	vinext	3.40 s	3.38 s	⚫ -0.7%
Production build time	vinext	3.64 s	3.62 s	⚫ -0.8%
RSC entry closure size (gzip)	vinext	125.5 KB	125.5 KB	⚫ +0.0%
Server bundle size (gzip)	vinext	216.2 KB	216.2 KB	⚫ +0.0%

View detailed results and traces

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