Summary:
Allow ProPricer exports to reuse original Open Plan project artifacts.
Problem Statement:
Exports from ProPricer always create a new project with new calendar and resource files, breaking continuity with the originally imported project.
Proposed Solution:
Introduce an export option to reattach to the original Open Plan project and reuse its calendar and resource files, with appropriate handling for shared/global entities.
Benefits:
Maintains round‑trip integration integrity
Reduces schedule inconsistencies
Minimizes downstream rework and confusion
