Changes in version 0.1.0 (2026-10-07)                  

  - Initial release.
  - Window-level Rasch difficulty estimation (dw_estimate()).
  - Two-sided CUSUM monitoring with change-point estimation and
    gradual/abrupt classification (dw_monitor()).
  - Design-based threshold tuning for a bank-wide false-alarm target
    (dw_tune()).
  - Score and pass-rate impact, recommended actions and audit log
    (dw_impact(), dw_actions()), and a two-point baseline
    (dw_twopoint()).