fix: allocate share-link layer tokens without collisions

.github/workflows/ci.yml

@@ -29,6 +29,7 @@ jobs:
         uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
         with:
           persist-credentials: false
+          fetch-depth: 0
 
       - name: Use Node.js
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
@@ -48,6 +49,10 @@ jobs:
       - name: Check package boundaries
         run: npm run check:boundaries
 
+      - name: Check published layer-token allocations
+        if: github.event_name == 'pull_request'
+        run: npm run layer-token:check -- --base-ref origin/main
+
       - name: Run unit tests
         run: npm test