/// Compile-time upper bound for BFS queue slots.
///
/// Used by `Bfs::program()` (no-arg form) for conformance testing. For GPU
/// dispatch, call [`bfs_queue_slots_for_device`] which queries the actual
/// device's `max_compute_workgroup_storage_size` at runtime.
pub const MAX_BFS_QUEUE: u32 = 8_192;