Renumber spec 001 decision placeholders to D-040–D-051; record the Danish publication

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

src/worker/parakeetEngine.ts

@@ -1,5 +1,5 @@
 /**
- * Parakeet TDT engine (Decisions.md D-WS7a): the non-Whisper inference path
+ * Parakeet TDT engine (Decisions.md D-051): the non-Whisper inference path
  * of the browser engine, used by the inference worker for catalog entries
  * with `family: "parakeet"`.
  *