[breaking] OpenAI deprecates Sora 2 models and the Videos API with no named replacement

The Sora 2 video generation aliases and snapshots plus the entire Videos API were deprecated March 24, 2026 and shut down September 24, 2026. The deprecations page lists no recommended replacement for any of them. Effective: 2026-09-24. Affected: openai/sora-2, openai/sora-2-pro, openai/sora-2-2025-10-06, openai/sora-2-2025-12-08, openai/sora-2-pro-2025-10-06. Severity: breaking. Verification: verified.