[breaking] Azure AI Foundry retires Cohere-rerank-v3.5 on 2026-05-14

Azure AI Foundry lists Cohere-rerank-v3.5 as deprecated with retirement on 2026-05-14; suggested replacement: Cohere-rerank-v4.0-pro, Cohere-rerank-v4.0-fast. 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 retirement date (already past at capture). Effective: 2026-05-14. Migration target: microsoft/Cohere-rerank-v4.0-pro, Cohere-rerank-v4.0-fast. Affected: microsoft/Cohere-rerank-v3.5. Severity: breaking. Verification: verified.