Optional ReadonlywaitHow long to wait for a pair's candidate node to materialize, by pair index. Per-pair because
the answer differs: a pair whose object is known to exist is merely late, while one nothing
vouches for is absent and must not hold up the restore. Return undefined to read immediately.
Resolve a parsed URL's pair chain to graph node ids, walking left to right. Resolution is fully explicit — each binding's shape names its candidate (a resolver locates data-dependent ones); there is no generic search. representNode is the reverse.
An unknown key, or a key whose extension produces no matching node, yields
nullat that index; how anullis surfaced is the caller's concern. A linked pair resolves against the preceding item's node, not the raw preceding pair.