Converts a single network. Recurses through `Implementation::Network` owning nodes. ID remapping:** Registry uses globally hashed IDs; runtime networks need local IDs. We pull the original local ID from `attr::ORIGINAL_NODE_ID` on each node and on each `NodeInput::Node` reference. References only point within the same network, so per-network lookup suffices. Exports:** the storage-side `Vec<Expo
(context: &ConversionContext, root: NetworkId)
source not stored for this graph (policy: none)