Kerman LauandXuanwo
0dd78656b9
Fixes #4514 ## Summary Honor an explicitly supplied `OpenaiReranker(api_key=...)` before falling back to `OPENAI_API_KEY`, matching the constructor documentation. Previously the environment key always won when both were set, so an instance configured for a different account still used the process-wide account. ## Tests Added four cases using real OpenAI client construction without sending requests: explicit/environment conflict, explicit key alone, environment fallback, and missing credentials. The conflict case fails before the change; all four pass afterward. Clients are closed after each assertion. - Targeted source-module tests: 4 passed. - Ruff check and format check: passed for both changed files. - Full native source build was attempted but failed because the environment has no Rust toolchain; bootstrap then attempted a cache path outside the writable workspace. The targeted tests load the current Python reranker module against installed dependencies and the released LanceDB package; no database/native behavior is exercised. Full native/integration suite not run. This change and its tests were prepared with an AI coding agent. The diff was reviewed and the failure/pass behavior verified locally. Co-authored-by: Xuanwo <github@xuanwo.io>
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