When comparing early versus late prerequisite collection, report both whole-entry

When comparing early versus late prerequisite collection, report both whole-entry completion and conditional final-stage completion. A final-stage cohort must include people who already satisfied the prerequisite earlier; restricting it to missing-prerequisite users removes the main potential benefit of the early prompt. Conversely, conditional final-stage rates are selected outcomes and cannot establish that prompt timing caused an overall improvement. Use explicit stage events, a fixed follow-up window, and distinguish persisted prerequisite evidence, automatic holds, and user help.