Investigate generic iOS 26 developer-services location override

[Rickebo]

Acceptance: arbitrary lat/lng including Uppsala 59.8586, 17.6389; safe stop/reset; iOS 26 developer-services credibility investigation; host/non-device validation.

[Rickebo]

Kickoff: acceptance criteria recorded for arbitrary coordinates (Uppsala 59.8586, 17.6389), safe stop/reset, iOS 26 developer-services credibility investigation, and host/non-device validation.

Tracking note: current token can create issues but cannot create/use the requested labels; repository API reports token permissions pull=true, push=false, triage=false, maintain=false. Add codex-tracked and priority:p2 when label-management access is available.