[vite-plugin-cloudflare] Handle cancelled request bodies

[harshmathurx]

Fixes #15027.

This fixes the Vite plugin request bridge so a Worker can intentionally cancel an oversized incoming request body and still return its response instead of surfacing stream-controller errors from the Node request adapter.

The old path used createRequest() from @remix-run/node-fetch-server, whose request-body stream keeps enqueuing IncomingMessage chunks after the Worker cancels the body reader. In the oversized-body case from the issue, that can surface as Invalid state: Controller is already closed / transport-level 500 noise before the Worker response is delivered.

This PR keeps the existing URL/header/protocol behavior, but creates the request body stream locally so cancellation detaches the Node request listeners and pauses the incoming request instead of letting later chunks enqueue into a closed controller.

---

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: this is a local dev transport bug fix covered by a regression test.

Local verification:

• pnpm install
• NODE_OPTIONS=--max-old-space-size=4096 pnpm test -F @cloudflare/vite-plugin -- utils.spec.ts
• pnpm --filter @cloudflare/vite-plugin exec oxfmt --check src/utils.ts src/__tests__/utils.spec.ts
• NODE_OPTIONS=--max-old-space-size=4096 pnpm --filter @cloudflare/vite-plugin check:type
• NODE_OPTIONS=--max-old-space-size=4096 pnpm --filter @cloudflare/vite-plugin build
• NODE_OPTIONS=--max-old-space-size=4096 pnpm --filter @cloudflare/vite-plugin exec oxlint src/utils.ts src/__tests__/utils.spec.ts --deny-warnings --type-aware

Before the fix, the new regression test produced 300 unhandled TypeError: Invalid state: Controller is already closed errors from @remix-run/node-fetch-server while exercising the Worker-side body cancellation case. After the fix, the focused test file passes cleanly.

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[changeset-bot]

🦋 Changeset detected

Latest commit: a86640e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@cloudflare/vite-plugin	Patch

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[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• .changeset/fuzzy-pears-repair.md: [@cloudflare/wrangler]
• packages/vite-plugin-cloudflare/src/tests/utils.spec.ts: [@cloudflare/wrangler]
• packages/vite-plugin-cloudflare/src/utils.ts: [@cloudflare/wrangler]