End-to-end Tinker model training and serving with Eve.

feat: add recipe-oriented Eve and Tinker examples.

Generalize the proven capability router into a shared train/eval/serve harness so distinct agent behaviors can be demonstrated without weakening model or credential boundaries. 👾 Generated with [Letta Code](https://letta.com) Co-Authored-By: Letta Code <noreply@letta.com>


Author Cameron Pfiffer Co-author Letta Code Date Commit