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

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

tests/mobileMemoryGuard.test.ts

@@ -106,7 +106,7 @@ describe("shouldWarnBeforeLoad", () => {
   });
 });
 
-describe("desktop-only models (D-WS7a)", () => {
+describe("desktop-only models (D-051)", () => {
   const parakeet = MODELS.find((model) => model.id === PARAKEET_MODEL_ID)!;
   const phone = { userAgent: ANDROID_UA, maxTouchPoints: 5, deviceMemoryGB: 8 };
   const ipad = { userAgent: IPAD_DESKTOP_UA, maxTouchPoints: 5, deviceMemoryGB: undefined };