AI sdk v5 has insanely slow TypeScript performance

### Description

On my Macbook Pro M3 I cannot get my type checker up in files that use 'ai'. I think there must be a performance bottleneck somewhere.

<img width="663" height="523" alt="Image" src="https://github.com/user-attachments/assets/ff5bb296-cfa6-448e-8ecd-663970869ced" />

### AI SDK Version

"@ai-sdk/azure": "2.0.0-beta.11"
"@ai-sdk/react": "2.0.0-beta.25"
"ai": "5.0.0-beta.25"