docs(cloudflare): Document the isStreamingResponse option

[sentry-junior]

DESCRIBE YOUR PR

This documents the isStreamingResponse option of the Cloudflare SDK (getsentry/sentry-javascript#24932) in the Cloudflare section of the options page. It explains what true, false, and undefined do, which responses the SDK treats as streamed by default (now including RSC text/x-component responses without a Content-Length), and shows the streamed SSR example for HTML.

getsentry/sentry-javascript#24932 merged on 2026-10-19 and isn't released yet. availableSince is set to 11.9.0, the next minor. Update the version if the release differs, and merge only after the release is out.

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PRE-MERGE CHECKLIST

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• Checked Vercel preview for correctness, including links
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LEGAL BOILERPLATE

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

EXTRA RESOURCES

• Sentry Docs contributor guide

via Jan Peer Stöcklmair.

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