Add LLM API retry engine for transient failures#211

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nhicks00 wants to merge 2 commits intompfaffenberger:mainfrom

nhicks00:feature/210-llm-api-retry-engine

Commits on Feb 27, 2026

feat(retry): add LLM API retry engine with exponential backoff

n0h0123
and
claude
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fix(retry): guard negative max_retries and tighten retry-after test
n0h0123
committed