Import Hestia data into OpenLCA

Hestia uses a variant of the [olca-schema](https://github.com/GreenDelta/olca-schema) developed by GreenDelta, the makers of OpenLCA. In theory it should therefore be relatively simple to import Hestia data into OpenLCA. This topic is about making that possibility a reality.

Tasks:

- [ ] Nomenclature/UUID harmonization where necessary
- [ ] Add fields or metadata missing in standard Hestia exports
- [ ] Convert Hestia data variant to JSON-LD that OpenLCA is happy with
- [ ] Integration testing

Suggested Lead: Selim Youssry

Start by reading the linked olca-schema documentation and comparing a standard Hestia export with the OpenLCA-compatible JSON-LD format. Identify required UUID or nomenclature harmonization and missing metadata, then define integration tests that demonstrate successful import into OpenLCA.

Written by the indexing model from the issue text.