add pytest-cov dependancy in test workflow

.github/workflows/test.yml

@@ -10,7 +10,7 @@ on:
       tags-ignore:
           - '**'
 jobs:
-    build:
+    build-and-test-test:
         runs-on: ubuntu-latest
 
         steps:
@@ -35,7 +35,7 @@ jobs:
                   cd backend
                   python -m pip install --upgrade pip
                   pip install .
-                  pip install pytest httpx pytest-env pytest-dotenv
+                  pip install pytest httpx pytest-env pytest-dotenv pytest-cov
             - name: Database migrations
               run: |
                   cd backend