feat(wrangler): add email.sending event subscription source

[ttoino]

Fixes MQ-1404 (internal).

Adds email.sending as an event subscription source for Queues event subscriptions.

wrangler queues subscription create now accepts --source email.sending together with two new flags:

• --zone-id — the zone that owns the sending domain
• --domain — the sending domain (zone apex or a verified subdomain)

Both flags are required for this source. wrangler queues subscription get renders the sending domain as the subscription's resource.

Implementation:

• New EMAIL_SENDING member of EventSourceType and EmailSendingEventSource type
• create.ts: parse/validate the new source and its flags
• utils.ts: getSourceResource returns the domain for display
• Changeset (wrangler minor)

---

• 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: the email.sending event subscription source and its events are already documented at https://developers.cloudflare.com/email-service/platform/event-subscriptions/

---

[changeset-bot]

🦋 Changeset detected

Latest commit: 5c531cd

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

This PR includes changesets to release 3 packages

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

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• .changeset/email-sending-event-subscription-source.md: [@cloudflare/wrangler]
• packages/wrangler/src/tests/queues/queues-subscription.test.ts: [@cloudflare/wrangler]
• packages/wrangler/src/queues/cli/commands/subscription/create.ts: [@cloudflare/wrangler]
• packages/wrangler/src/queues/cli/commands/subscription/utils.ts: [@cloudflare/wrangler]
• packages/wrangler/src/queues/subscription-types.ts: [@cloudflare/wrangler]

[devin-ai-integration]

✅ Devin Review: No Issues Found

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

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commit: 5c531cd