fix(server): abort interrupted ACP MCP fetches (#23955)

Co-authored-by: kiiwee <6160452+kiiwee@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
e64a6d4ca8Julius Marminge committed on 10/23/2026, 6:44:50 AM· committed by GitHubparent9a63802

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