[wrangler] Add custom-domain Preview provisioning note

[yomna-shousha]

Follow-up to #15336. This change is independent of #15434 and is based on main, not that PR.

After a successful custom-domain deployment with at least one route that explicitly sets previews_enabled: true, Wrangler now prints one note after the deployed trigger list:

Note: DNS and TLS certificate provisioning for Preview domains may continue after this deploy. If a new Preview URL does not work immediately, wait a few minutes and retry.

The supporting live-test report (wrangler-pr15434-repro-20260905115829/REPORT.md, "Follow-up PR for provisioning delay") found that two new custom Preview hosts initially failed TLS and worked on a later retry. The static note is intentional because the current custom-domain API exposes no reliable DNS or TLS readiness state. Polling the configured base domain would also be wrong for preview-only routes, where that bare hostname is intentionally not active. This change therefore makes no extra API, DNS, HTTP, or TLS request and does not delay deployment completion.

The note uses the existing completed Custom domains trigger result, so failed custom-domain publishing does not print it. It is not gated on TTY state, which keeps interactive and CI output consistent.

---

• 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 only adds an explanatory CLI note and does not change configuration or API behavior.

Note

This is a contribution from an AI agent: OpenCode, GPT-5.6 Sol.

[changeset-bot]

🦋 Changeset detected

Latest commit: f718608

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

This PR includes changesets to release 5 packages

Name	Type
@cloudflare/deploy-helpers	Patch
wrangler	Patch
@cloudflare/remote-bindings	Patch
@cloudflare/vite-plugin	Patch
@cloudflare/vitest-plugin	Patch

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commit: f718608