[wrangler] Surface remote proxy session errors

[staticpayload]

Fixes #11098.

Describe your change...

• Include controller reason and root cause in startRemoteProxySession errors so Access/cloudflared issues are visible.
• Update remote bindings tests to match the richer error message.
• Add wrangler changeset.

Tests: pnpm test:ci -F wrangler -- remote-bindings-errors
E2E tests not run (requires Cloudflare credentials).

---

• 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: error messaging change only.

A picture of a cute animal (not mandatory, but encouraged)

---

[changeset-bot]

🦋 Changeset detected

Latest commit: 9380adb

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

This PR includes changesets to release 3 packages

Name	Type
wrangler	Patch
@cloudflare/vite-plugin	Patch
@cloudflare/vitest-pool-workers	Patch

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[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• packages/vite-plugin-cloudflare/e2e/remote-bindings.test.ts: [@cloudflare/wrangler]
• packages/wrangler/e2e/remote-binding/remote-bindings-api.test.ts: [@cloudflare/wrangler]
• packages/wrangler/src/tests/dev/remote-bindings-errors.test.ts: [@cloudflare/wrangler]
• packages/wrangler/src/api/remoteBindings/start-remote-proxy-session.ts: [@cloudflare/wrangler]

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 4 additional findings.

[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• packages/vite-plugin-cloudflare/e2e/remote-bindings.test.ts: [@cloudflare/wrangler]
• packages/wrangler/e2e/remote-binding/remote-bindings-api.test.ts: [@cloudflare/wrangler]
• packages/wrangler/src/tests/dev/remote-bindings-errors.test.ts: [@cloudflare/wrangler]
• packages/wrangler/src/api/remoteBindings/start-remote-proxy-session.ts: [@cloudflare/wrangler]

[pkg-pr-new]

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@11896

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@11896

miniflare

npm i https://pkg.pr.new/miniflare@11896

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@11896

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@11896

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@11896

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@11896

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@11896

@cloudflare/workers-utils

npm i https://pkg.pr.new/@cloudflare/workers-utils@11896

wrangler

npm i https://pkg.pr.new/wrangler@11896

commit: 9380adb

[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• packages/vite-plugin-cloudflare/e2e/remote-bindings.test.ts: [@cloudflare/wrangler]
• packages/wrangler/e2e/remote-binding/remote-bindings-api.test.ts: [@cloudflare/wrangler]
• packages/wrangler/src/tests/dev/remote-bindings-errors.test.ts: [@cloudflare/wrangler]
• packages/wrangler/src/api/remoteBindings/start-remote-proxy-session.ts: [@cloudflare/wrangler]

[workers-devprod]

Codeowners approval required for this PR:

• ✅ @cloudflare/wrangler

Show detailed file reviewers

[workers-devprod]

Codeowners reviews satisfied