Cloudflare docs: queue handlers in custom workers

[JoshuaKirby88]

Summary

• Document how to add a queue handler to a custom worker that uses runWithCloudflareRequestContext so queue processing runs inside the Next.js/OpenNext request context.
• Show a generic example that reconstructs a Request from queue message metadata and calls application code with the usual context helpers.
• Add a short cross-link from the caching page’s queue section to the custom worker how-to for users who need this pattern.

[Copilot]

Pull request overview

This pull request adds documentation for implementing queue handlers in custom Cloudflare workers while maintaining access to the Next.js request context. The changes enable developers to process queue messages with the same context helpers (getCloudflareContext(), headers(), cookies()) available in regular HTTP requests.

Changes:

• Added a comprehensive guide showing how to implement queue handlers using runWithCloudflareRequestContext
• Provided a complete code example demonstrating message reconstruction from queue metadata
• Added a cross-reference link from the caching page to guide users who need this pattern

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
pages/cloudflare/howtos/custom-worker.mdx	Added new section "Queue handlers with Next.js request context" with complete implementation example and explanation
pages/cloudflare/caching.mdx	Added cross-reference link to the custom worker how-to for users processing queue messages

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