CLI not using system time - displays incorrect dates for builds and versions

### Describe the bug

The GitHub Copilot CLI appears to be using incorrect dates for build timestamps and version information instead of using the system time. This results in displaying random or incorrect dates that don't match the actual system clock.

### Affected version

0.0.337

### Steps to reproduce the behavior

1. Run the copilot CLI
2. Observe the version information and build dates displayed
3. Compare with actual system time

### Expected behavior

The CLI should use the system time for all timestamps, including:
- Build dates
- Version timestamps
- Any other time-related information displayed to users

This ensures consistency and accuracy in version tracking and debugging.

### Additional context

This issue affects the ability to accurately track when builds were created and can cause confusion when debugging or reporting issues.