fix(server): surface ACP stderr when cursor-agent exits at session start (#12625)

Co-authored-by: Julius Marminge <51714798+juliusmarminge@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
d6f291303dCestercian committed on 9/19/2026, 10:12:03 PM· committed by GitHubparent52d08a1
9 files changedLine totals unavailable