Address all review comments: fix test counts, remove unused imports, improve workflow

Co-authored-by: Kenearos <86194771+Kenearos@users.noreply.github.com>

.github/workflows/test.yml

@@ -38,13 +38,19 @@ jobs:
       run: |
         pytest tests/ -v --cov=. --cov-report=xml --cov-report=term-missing
 
+    - name: Generate .coverage file
+      if: matrix.python-version == '3.11'
+      run: |
+        coverage run -m pytest tests/
+
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v4
       with:
         file: ./coverage.xml
         flags: unittests
         name: codecov-umbrella
-        fail_ci_if_error: false
+        fail_ci_if_error: true
+        token: ${{ secrets.CODECOV_TOKEN }}
 
     - name: Generate coverage badge
       if: matrix.python-version == '3.11'
@@ -94,4 +100,3 @@ jobs:
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # Exit-zero treats all errors as warnings
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-      continue-on-error: true