Vehicle ids not parsed as uint64_t

[jcoupey]

Vehicle ids have vroom::Idtype, aka uint64_t. But in input_parser.cpp, they are parsed with rapidjson's GetUint here:

vroom/src/utils/input_parser.cpp

Line 209 in 2a0a9c5

auto v_id = json_vehicle["id"].GetUint();

and here:

vroom/src/utils/input_parser.cpp

Line 365 in 2a0a9c5

Vehicle current_v(json_vehicle["id"].GetUint(),

We should get them using GetUint64 just like job ids.