ep: Cache Anthropic client (#46406)

This makes running `predict` with the teacher model much faster, when
there are many examples.

Release Notes:

- N/A

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Co-authored-by: Ben Kunkle <ben@zed.dev>
ad369ca2b7Max Brunsfeld committed on 1/9/2026, 12:04:40 AM· committed by GitHubparenta842e1d
2 files changedLine totals unavailable