ci: Add test result collection job

.github/workflows/test.yml

@@ -42,3 +42,15 @@ jobs:
 
       - name: Run unit tests
         run: poetry run pytest
+
+  results:
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - run: |
+          result="${{ needs.test.result }}"
+          if [[ $result == "success" || $result == "skipped" ]]; then
+            exit 0
+          else
+            exit 1
+          fi