[CHORE] Track region job ended up running in

[darcyclarke]

📋 Description

Right now we don't track where the runner is located with could have an effect from one to the next run.

📂 Category

Code Refactoring - Improve code structure/quality

🎯 Motivation

The assumption today is that there isn't some consistent bias but we should track this data either way for debugging & ensure one variant/fixture/tool isn't somehow unfairly advantaged.

🎌 Scope of Work

Add verbose logs as well as output to end-user UI.

📊 Impact Level

Low - Minor improvements, no breaking changes

⏰ Urgency

Low - Can be done when time permits

⚠️ Breaking Changes

No response

🧪 Testing Strategy

No response

✅ Definition of Done

• Changes implemented as described
• Existing functionality verified unaffected
• Tests updated and passing
• Documentation updated if needed
• Code reviewed and approved
• Performance impact assessed
• Breaking changes documented
• Migration guide provided (if applicable)
• Rollback plan prepared (if high risk)

🔗 Dependencies

No response

⏱️ Estimated Timeline

No response

📎 Additional Context

No response