test(reports): add vitest and cover comparison-window logic

.github/workflows/ci.yml

@@ -44,6 +44,28 @@ jobs:
       - name: Validate Prisma schema
         run: npx prisma validate
 
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    env:
+      # Dummy value so loading prisma.config.ts never fails on a missing var.
+      DATABASE_URL: postgresql://ci:ci@localhost:5432/ci
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 20
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Unit tests
+        run: npm test
+
   build:
     name: Build
     runs-on: ubuntu-latest
@@ -73,6 +95,6 @@ jobs:
   ci:
     name: ci
     runs-on: ubuntu-latest
-    needs: [quality, build]
+    needs: [quality, test, build]
     steps:
-      - run: echo "Quality and build gates passed."
+      - run: echo "Quality, test and build gates passed."