fix(integrations): redirect cloudflare workers to sdk integration

[Christinarlong]

DESCRIBE YOUR PR

The third-party cloudflare workers app is doesn't work anymore (people should use the sdk integration) so we need to redirect the old docs to the sdk integration

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SLA

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• Please give the docs team up to 1 week to review your PR unless you've added an urgent due date to it.
  Thanks in advance for your help!

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• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
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Project	Deployment	Preview	Comments	Updated (UTC)
develop-docs	Ready	Preview	Comment	Dec 4, 2025 6:12pm
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