[wrangler] Support Artifacts Queue event sources

[dmmulroy]

Allow wrangler queues subscription create to target the existing Artifacts Event Subscription sources:

• artifacts for account-scoped events
• artifacts.repo for repository-scoped events

Previously, Wrangler rejected both values during client-side argument validation even though the Event Subscriptions API accepts them. This adds both source types to Wrangler's typed source union and parser, and verifies the generated API request bodies for each source.

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• 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 exposes source types already supported by the platform and updates Wrangler's built-in help output.

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🦋 Changeset detected

Latest commit: 55564e3

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

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