Master's #1072 test asserted bare qwen3-embedding@1024 threads dimensions:1024;
wave PR #3699 suppresses the param when the request equals the native width
(1024 for the bare id), so the same input now correctly returns undefined —
pinned by dims-qwen3-native.test.ts. Moved this test to 512 to keep its actual
intent (bare id recognized as Matryoshka-capable) without contradicting the
suppression. Third composition defect of the wave; caught by CI shard 8.