`get_copilot_job_status` fails with JSON unmarshal error for `response_status_code`

[C-Ross]

Description:

When calling get_copilot_job_status for certain pull requests, the tool fails with a JSON parsing error:

Failed to parse response: json: cannot unmarshal string into Go struct field JobError.error.response_status_code of type int

Steps to Reproduce:

1. Call get_copilot_job_status with a valid pull request number that has Copilot agent activity
2. Observe the parsing error

Expected Behavior:

The tool should return the Copilot job status information or handle the error response gracefully.

Actual Behavior:

The tool fails to parse the API response because response_status_code in the JobError.error struct is defined as int, but the API returns it as a string.

Additional Context:

• The error is reproducible across multiple PRs in one repository but works correctly for PRs in other repositories
• Other get_copilot_job_status calls succeed and return expected results (status, workflow run URL, timestamps, etc.)
• This suggests the error may occur when the API returns an error response with a different schema than expected
• Note: I can provide full reproduction details including specific repository/PR information privately. Please reach out to @C-Ross directly.