Copilot cli sluggish and hanging

### Describe the bug

Pasted a build log into copilot cli and it became sluggish. Window hangs but is not "not responding". Repeated "Range Error: maximum call stack size" type errors. Impossible to continue with session

### Affected version

GitHub Copilot CLI 1.0.22-0

### Steps to reproduce the behavior

1. Produce diagnostic verbosity build log
2. Paste it into copilot cli
3. Hit enter

### Expected behavior

To process the prompt and start doing things

### Additional context

_No response_

Start by reproducing the hang with a diagnostic build log in Copilot CLI 1.0.22-0, then trace the CLI entry point that handles pasted prompts and the reported Range Error. Done means the prompt is processed without the window hanging or exceeding the call stack.

Written by the indexing model from the issue text.