Upgrade @huggingface/transformers to 4.3.2 and carry the sequential-session patch

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/WorkBreakdown.md

@@ -339,6 +339,10 @@ cached.
       `language`/`task` the same way the HTTP route does, and
       `tests/server-live.test.ts` covers the bridge against a fake sidecar.
 
+## M8 — Transcription quality and speed (spec 001)
+- [x] Transformers.js 4.2.0 → 4.3.2, sequential-session patch regenerated
+      for 4.3.2 and guarded by `tests/transformers-runtime.test.ts` (D-WS1a).
+
 ---
 
 ## Deliberately out of scope (for now)