chore: Sync dependency lockfiles from pyproject.toml#415

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Commits on Jan 12, 2026

feat: add spiral plot contours, test infrastructure, and labels description (#414)

blalterman
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claude
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test(labels): add description feature tests and fix anti-patterns

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claude
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Commits on Jan 13, 2026

test(fitfunctions): improve test quality and refactor combined_popt_psigma (#416)

blalterman
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claude
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Commits on Jan 14, 2026