pub const MAX_REACHABLE: usize = 10_000_000;Expand description
Hard cap on the total number of objects reachable_objects will
visit per call. Matches the scale of MAX_ANCESTORS but applies
to the full object closure (commits + trees + blobs + chunks), so it
is intentionally larger. A repo that exceeds this cap has to split
pushes — the push-path is the only caller for now.