SBN: Add missing properties, remove not built segments

Hi @csebastiao ,
first (and maybe last) request/question from @MoritzStefaner about the data:
- [ ] the real network data does not have the total_length / total_coverage / total_directness properties. Could you add them?
- [ ] built_in has for the 201 never built segments the String "No" - but it would be clearer to parse if this was just removed. Could you do that? (I can also do this if you can't)

I have uploaded the data here, it can be replaced - but the file names are important, please do no change them: https://github.com/BikeNetKit/dataexport/tree/main/dataexports/latest/sortbikenet

Empieza inspeccionando los datos cargados en dataexports/latest/sortbikenet y compara los datos reales de la red con las propiedades solicitadas. Conserva todos los nombres de archivo existentes, añade total_length, total_coverage y total_directness, y elimina los valores "No" de built_in para los 201 segmentos que nunca se construyeron; se considera terminado cuando los datos actualizados estén disponibles en esa ubicación.

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