fix: migrate away from deprecated AI model

[kiyarose]

Resolves the 500 error during AI summary generation where the previous model @cf/meta/llama-3.3-70b-instruct-fp8-fast had become deprecated. Bumps package version to 1.16.9 as requested.

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PR created automatically by Jules for task 12393436856601695224 started by @kiyarose

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