pecme 0.1.1

• Hardened grid search against failed/nonfinite candidates and restricted EBIC recomputation to criterion = "ebic".
• Fixed LOO handling of all-failed folds, required converged fold refits, and recomputed Adaptive Lasso pilots/weights within each training fold.
• Preserved missing_x behavior in bootstrap refits and repaired complete-case group remapping and regression-imputation intercept handling.
• Stored the full fixed-effect covariance matrix for valid Hessian-based fits and used (x^T V_beta x) for prediction standard errors.
• Information criteria now use the number of informative response rows when completely missing responses are present.
• Added explicit handling/documentation for transformed responses under censoring and for model-matrix missing-X imputation.
• pecme_mi_combine(use_refit = TRUE) now requires converged refits with valid finite standard errors.