ci: upload coverage to Codecov

Author: llbbl

.github/workflows/ci.yml

@@ -26,8 +26,13 @@ jobs:
       - name: Install dependencies
         run: pnpm install
 
-      - name: Run tests
-        run: pnpm test --run
+      - name: Run tests with coverage
+        run: pnpm test:coverage --run
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Initialize local database
         run: pnpm db:init:local