both(edgeType, nodeType) ignores nodeType #11

Problem

both(edgeType, nodeType) ignores nodeType. src/query/TraversalQuery.ts:541 appends

AND EXISTS (SELECT 1 FROM nodes n WHERE n.id = id AND n.type = ?)

to the second UNION branch only, and the unqualified id binds to n.id, so the predicate is always true.

Repro: node a (Person) with a→p (Person), a→c (Company), c2→a (Company):
traverse(a).both('LINK','Person').maxDepth(1).toArray() returns [p, c, c2], expected [p].

The existing test should respect node type filter in both() (tests/unit/TraversalQuery.test.ts:186) already specifies this and fails when run on its own.

Benchmark report: 2026-11-02, Apple M2 Pro, Node 22, at a7f9ea7.