[breaking] Azure AI Foundry retires o1 on 2026-07-15

Azure AI Foundry lists o1 (2024-12-17) as deprecated with retirement on 2026-07-15. Azure retirement dates are platform-specific and may differ from the model provider's own schedule. The page does not date the announcements; announced_at reflects the page capture date. Effective: 2026-07-15. Affected: microsoft/o1-2024-12-17. Severity: breaking. Verification: verified.