Constant NODE_STORAGE_LIMIT_BYTES 

pub const NODE_STORAGE_LIMIT_BYTES: u64 = _; // 5_368_709_120u64

Node storage capacity limit (5 GB).

Used to derive max_records for the quoting metrics pricing curve. A node advertises NODE_STORAGE_LIMIT_BYTES / MAX_CHUNK_SIZE as its maximum record count, giving the pricing algorithm a meaningful fullness ratio instead of a hardcoded constant.