fix(deps): update dependency ai to v2.2.19

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ai (source)	2.2.18 -> 2.2.19

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Release Notes

vercel/ai (ai)

### [`v2.2.19`](https://togithub.com/vercel/ai/releases/tag/ai%402.2.19) [Compare Source](https://togithub.com/vercel/ai/compare/ai@2.2.18...ai@2.2.19) ##### Patch Changes - [`699552d`](https://togithub.com/vercel/ai/commit/699552d): add experimental_StreamingReactResponse

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