timeline-estimation

Timeline estimation using three-point (PERT), analogous, parametric, and velocity-based techniques with O/M/P date ranges. Integrates with dependency-mapping for critical-path timelines, translates working days to calendar dates respecting holidays and freezes, recommends buffer, defines milestones with entry criteria, and assesses deadline probability when a deadline is supplied. Mermaid Gantt and range diagrams with optional PNG export.