Update review findings

src/engine/guidance/assemble_route.cpp

@@ -19,8 +19,12 @@ Route assembleRoute(const std::vector<RouteLeg> &route_legs)
         route_legs.begin(), route_legs.end(), 0., [](const double sum, const RouteLeg &leg) {
             return sum + leg.duration;
         });
+    auto weight = std::accumulate(
+        route_legs.begin(), route_legs.end(), 0., [](const double sum, const RouteLeg &leg) {
+            return sum + leg.weight;
+        });
 
-    return Route{duration, distance};
+    return Route{distance, duration, weight};
 }
 
 } // namespace guidance