{
  "status": "PASS_preparation_only",
  "subset": "Vihren region; no national OSM/OBF build performed",
  "bbox": "23.30,41.67,23.50,41.84",
  "workers": 4,
  "total_pois": 1915,
  "unknown_fallback": 150,
  "spot_heights_preserved": 296,
  "unclassified": 0,
  "hiking_route_relations": 82,
  "candidate_overlay_segments": 273,
  "caveat": "Serial route grouping differs (78 vs 82). OBF rendering not validated."
}