fix(server): preserve Claude final-result API error text (#19136)

Co-authored-by: Julius Marminge <julius0216@outlook.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
55a8fe9a93Ibrahim Elkamali committed on 10/20/2026, 4:24:25 AM· committed by GitHubparent3c63b50
2 files changedLine totals unavailable