[BUG] type=building relations generate with only one floor

[zer0-dev]

Describe the bug
All buildings that are type=building relations, appear in game as one-story buildings. Usually the number of floors is on the part elements of these relations (https://wiki.openstreetmap.org/wiki/Relation:building). As I noticed, this bug occurs only when parts of the type=building relation are relations themselves

Used bbox area
55.935008 37.494771 55.935597 37.500157

Arnis and Minecraft version
Arnis v2.1.2
Minecraft v1.21.4

Screenshots

[louis-e]

Thank you for the detailed report! This problem should be fixed with #232 and included in the next release! :)