Store metadata about original OSM data, and return it in the API response, if available.

include/storage/storage_config.hpp

@@ -58,6 +58,7 @@ struct StorageConfig final : IOConfig
                     ".osrm.turn_duration_penalties",
                     ".osrm.datasource_names",
                     ".osrm.names",
+                    ".osrm.timestamp",
                     ".osrm.properties",
                     ".osrm.icd",
                     ".osrm.maneuver_overrides"},

include/storage/view_factory.hpp

@@ -272,6 +272,11 @@ inline auto make_partition_view(const SharedDataIndex &index, const std::string
         level_data_ptr, std::move(partition), std::move(cell_to_children)};
 }
 
+inline auto make_timestamp_view(const SharedDataIndex &index, const std::string &name)
+{
+    return util::StringView(index.GetBlockPtr<char>(name), index.GetBlockEntries(name));
+}
+
 inline auto make_cell_storage_view(const SharedDataIndex &index, const std::string &name)
 {
     auto source_boundary = make_vector_view<NodeID>(index, name + "/source_boundary");