* fix(sse): silence noisy proxy-failure log on caller-initiated abort
The pinned-proxy dispatch path in proxyFetch.ts logged every failure —
including a plain caller abort or the caller's own AbortSignal timeout
firing — as "[ProxyFetch] Proxy request failed ... fail-closed". A
client cancelling its own request is not a proxy transport failure and
shouldn't be misreported as one in ops logs/alerting; it still
propagates to the caller unchanged (fail-closed behavior is untouched).
Co-authored-by: TuyulSpam <287281626+TuyulSpam@users.noreply.github.com>
Inspired-by: https://github.com/decolua/9router/pull/2589
* chore(changelog): fragment for #7266
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Co-authored-by: TuyulSpam <287281626+TuyulSpam@users.noreply.github.com>
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