fix(assets): add AbortSignal timeout to remote image fetch

[bunlongheng]

The remote image fetch in redirectValidation.ts passes no signal or timeout to fetchFn. A slow or unresponsive image origin server will stall the fetch indefinitely - blocking SSR responses in production and the dev server during development. Added AbortSignal.timeout(10_000) to the fetch options so the call aborts after 10 seconds rather than hanging forever.

[changeset-bot]

⚠️ No Changeset found

Latest commit: f30a0c7

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[codspeed-hq]

Merging this PR will not alter performance

✅ 21 untouched benchmarks

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_{Comparing bunlongheng:fix/remote-image-fetch-timeout (f30a0c7) with main (bd2c1a5)¹}

Footnotes

1. No successful run was found on main (7c4bf1b) during the generation of this report, so bd2c1a5 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩