Ensure delay doesn't reject with undefined

[lukasIO]

Description

Changes Made

Pre-Review Checklist

• Build passes: All builds (lint, typecheck, tests) pass locally
• AI-generated code reviewed: Removed unnecessary comments and ensured code quality
• Changes explained: All changes are properly documented and justified above
• Scope appropriate: All changes relate to the PR title, or explanations provided for why they're included
• Video demo: A small video demo showing changes works as expected and did not break any existing functionality using Agent Playground (if applicable)

Testing

• Automated tests added/updated (if applicable)
• All tests pass
• Make sure both restaurant_agent.ts and realtime_agent.ts work properly (for major changes)

Additional Notes

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Note to reviewers: Please ensure the pre-review checklist is completed before starting your review.

[changeset-bot]

⚠️ No Changeset found

Latest commit: d3071b0

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[devin-ai-integration]

Devin Review found 1 potential issue.

View 1 additional finding in Devin Review.

[devin-ai-integration]

🟡 Incomplete fix: early-return path at line 792 still rejects with potentially undefined reason

The PR's intent (per the commit message "Ensure delay doesn't reject with undefined") is to prevent the delay promise from rejecting with undefined. The fix at line 796 adds ?? new Error('delay aborted') as a fallback, but the early-return path at line 792 (return Promise.reject(signal.reason)) has the same problem and was not updated. If signal.reason is undefined (e.g., in older runtimes or polyfills where AbortSignal.reason is not supported), this path will still reject with undefined.

(Refers to line 792)

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