fix: add debug step to check dist folders

Author: poad

.github/workflows/ci.yml

@@ -34,6 +34,12 @@ jobs:
         ls -la node_modules/@llm-ts-example/
         cat node_modules/@llm-ts-example/common-backend-core/package.json
 
+    - name: Check build artifacts exist
+      run: |
+        ls -la common/core/dist/ || echo "common-core dist not found"
+        ls -la common/backend/core/dist/ || echo "common-backend-core dist not found"
+        ls -la node_modules/@llm-ts-example/common-backend-core/dist/ || echo "symlink dist not found"
+
     - name: Build
       run: |
         pnpm --filter @llm-ts-example/common-core build