Fix OfferNodeType initialization error

Remove supplier_name field from OfferNodeType constructor in resolve_nearest_offers - this field does not exist in the type definition and causes 400 errors.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

geo_app/schema.py

@@ -1486,7 +1486,6 @@ class Query(graphene.ObjectType):
                     product_uuid=node.get('product_uuid'),
                     product_name=node.get('product_name'),
                     supplier_uuid=node.get('supplier_uuid'),
-                    supplier_name=node.get('supplier_name'),
                     latitude=node.get('latitude'),
                     longitude=node.get('longitude'),
                     country=node.get('country'),