Pydantic AI v2.48.0 wires up gpt-6-sol, gpt-6-luna and claude-opus-5-5

Pydantic AI 2.48.0 (Sep 22) adds the new OpenAI audio models with genai-prices 0.1.7/0.1.8 and preserves message IDs across load/dump for Vercel AI (UIMessage.id) and AG-UI (Message.id) adapters; 2.47.0 (Sep 21) fixed TypeSafeModel route handling and pickling of a None route.