ci: add coverage step to workflow

Author: leiding01

.github/workflows/ci.yml

@@ -7,6 +7,7 @@ on:
 jobs:
   smoke-tests:
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -16,5 +17,11 @@ jobs:
         with:
           node-version: '20'
 
-      - name: Run smoke tests (no deps)
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run smoke + unit tests
         run: npm test
+
+      - name: Run coverage
+        run: npm run test:coverage