Add number of slots in a citybike station to GraphQL API #116
Description
Could we get a 'total_slots' field to the BikeRentalStation type in the GraphQL API, like in this dataset?
The sum of bikesAvailable and spacesAvailable is not enough, since the stations can have more bikes than they have slots.
The data set from avoindata.fi / HSL is not up to date and has total_slots=1 for some stations which are in active use.