Function graph_path_inventory_bytes 

fn graph_path_inventory_bytes(nodes: &[Node], direct_paths: &[String]) -> u64

Reserve existing path inventories before constructing their sets or node clones. Ten node/string envelopes cover direct/current/manifest/package/affected path sets plus temporary graph-loader inventories. Deleted direct paths are separate because they are absent from the expected node inventory. This is an inherited staging estimate, not a new source/path-size or user-facing limit.