Improve Type Safety in Command Helpers

[google-labs-jules]

This change improves the type safety of the pollForToken function in src/utils/command-helpers.ts by removing a @ts-expect-error and adding a type guard to safely handle the error object in a catch block. This makes the code more robust and easier to maintain.

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PR created automatically by Jules for task 18230714401657410548 started by @serhalp

[google-labs-jules]

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[github-actions]

📊 Benchmark results

Comparing with ff24801

• Dependency count: 1,055 (no change)
• Package size: 317 MB (no change)
• Number of ts-expect-error directives: 365 ⬇️ 0.27% decrease vs. ff24801