Provide OSM node ids in nearest response

[vkurchatkin]

It would be useful to have node ids of matched segment in nearest response. To be specific, that could be used to simplify building traffic data CSV from raw GPS data

[TheMarex]

For an existing solution try using the match service. Since 5.2 we expose the OSM ids for each RouteLeg if you set annotations=true.

[vkurchatkin]

@TheMarex already doing that, but I thought it would be nice to have an easier way to do this. If you are interested in such a feature, I would like to take a stab

[danpat]

@vkurchatkin Go for it :-)

[SiarheiFedartsou]

Done in https://github.com/Project-OSRM/osrm-backend/pull/4436/files