handle multipolygons

Import log is full of complaints about multipolygons, such as

`Relation 10483173 has unhandled member role inner, ignoring it`

https://www.openstreetmap.org/relation/10483173 is a perfectly fine multipolygon with a hole inside

The issue is about handling multipolygon data from OpenStreetMap during import. Look for the import code that processes OSM relations and logs the 'unhandled member role' error. The specific relation 10483173 is a multipolygon with a hole. Investigate how the code currently handles polygon roles like 'inner' and 'outer'. Running the import with this relation as a test case would show the current behavior. The fix likely involves updating the geometry processing logic to correctly interpret multipolygon members.

Escrito por el modelo de indexación a partir del texto del issue.