fix: lane referencing boundary outside chunk

Lane boundary IDs were being written into the logical lane proto even when those lane boundaries were not present in the chunk output, which caused a segfault when trying to resolve these missing references. This happened because in chunked mode WorldChunks only include chunks near the vehicle, while logical lanes still keep references to boundaries from the full map.

With this MR, only the IDs of the lane boundaries that are present in the WorldChunks are written to the logical lane proto.