Fix CallawaySantAnna propensity score estimation (IRLS)#202

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igerber merged 6 commits intomainfrom

Mar 16, 2026

Commits on Mar 15, 2026

Replace BFGS logit with IRLS for propensity score estimation

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Address PR #202 review feedback: pscore_trim validation and solve_logit rank_deficient_action

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Honor rank_deficient_action="error" in propensity score paths

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Reject pscore_trim=0.0 to prevent infinite IPW weights; update docs

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Validate pscore_trim at fit() to guard against set_params bypass

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Add TODO for covariate-adjusted R benchmark coverage

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