Optimize how cargo is loaded into a truck, trailer or shipping container. Returns a physically valid layout (placements with x/y/z and rotation, respecting stacking, fragility, weight and axle constraints) plus the freight billing metrics: LDM (loading meters), linear feet, EUR pallet positions and total weight. Submits an async job and waits for the result — typically 5-30 seconds. Use list_vehicles first if you are unsure of the vehicle code.

List all available trucks, trailers and shipping containers with their interior dimensions (mm) and max payload (kg). Use the returned codes as the "vehicle" argument of pack_cargo.

Check the status/result of a packing job by id (only needed if pack_cargo timed out on a very large manifest).