Add failing tests for LookupIndex context manager protocol (#143) [ON HOLD]#144

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lookup-index-context-manager

Commits on Mar 9, 2026

Add failing tests for LookupIndex context manager and resource cleanup

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amc-corey-cox
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Strengthen context manager and cleanup tests per Copilot feedback

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amc-corey-cox
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Add context manager protocol to LookupIndex and cleanup in transform_spec

amc-corey-cox
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claude
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