Wish: Export calculated and combined schedule fields to properties

Schedules with calculated or/and combined fields:

Wish that it can look like this in Solibri:

Use cases:

- Almost all kinds of classification codes are combined of several parameters.
- We usually want to add a prefix to Rebar Numbers to make a unique position number.
- Calculated weights of elements (lifting/transport) as properties. (Revit usually have Volume and Unit Weight as available fields)

The issue provides screenshots and use cases but names no files, tests, or entry points. Start by tracing how Revit schedules and exported IFC properties are handled, then clarify the supported syntax and expected Solibri output for combined and calculated fields. Done means those schedule-derived values appear as exported properties for the stated use cases.

Written by the indexing model from the issue text.