Re-check non_existing-Liste with existing bike stands

[tordans]

https://github.com/britiger/bikeparkingberlin/pull/69 shows, that apparently our district is still working on adding those bike stands that where marked completed last year.

So now there is a case, where we might get stands in the non-existing-List that in fact are there.

The frontend handles those correctly by showing them as green (not blue), so the blue-status seems to be overwritten by green – which is great.

However, at some point we might need to re-check the non_existing-List against new OSM Data to clean it up. IMO not a priority ATM; I created the issue FYI and for future reference.

[tordans]

Looking at 404 (https://www.openstreetmap.org/node/7486811029 vs. https://github.com/britiger/bikeparkingberlin/blob/10f866f71803e39b4a5458fbf0f256a07fa027d2/database/external_data/parking_non_existing.csv#L7) I now think …

• the blue markers should not overwrite the greens; maybe both should show up?
• or we should only compare the green marker against bike stands that have no-access or access=yes; in this case (https://www.openstreetmap.org/node/7486811029) its access=permissive cause those are most likely private bike stands and not the city's.