Incorrect geometry for large relations in geoparquet exports

[utkarshkukreti]

In the current geoparquet exports, the geometry column of some large relations is set to its bounding box. For example, for France (osm_id = 2202162):

D .mode line
D select bbox, ST_GeomFromWKB(geometry) from '2026-01-19.parquet' where osm_id = 2202162;
                    bbox = {'xmin': -178.3873749, 'ymin': -50.2187168, 'xmax': 172.3057152, 'ymax': 51.3055721}
st_geomfromwkb(geometry) = POLYGON ((-178.3873749 -50.2187168, -178.3873749 51.3055721, 172.3057152 51.3055721, 172.3057152 -50.2187168, -178.3873749 -50.2187168))

ohsome-planet's README says:

For relations that consist of more than 500 members we skip MultiPolygon geometry building and fall back to GeometryCollection. Check MEMBERS_THRESHOLD in ohsome-contributions/src/main/java/org/heigit/ohsome/contributions/contrib/ContributionGeometry.java.

which might be the reason for this.

The value of MEMBERS_THRESHOLD is hardcoded in that file so I'm not sure if there's a way to fix this.