fix: resolve mypy type errors in parser.py and config.py

.gitea/workflows/ci.yml

@@ -26,16 +26,10 @@ jobs:
         run: pytest tests/ -v --cov=depnav --cov-report=term-missing
 
       - name: Run linting
-        run: |
+        run: ruff check depnav/ tests/
-          echo "Running ruff check..."
-          ruff check depnav/ tests/ || echo "Ruff check failed with exit code $?"
-          echo "Ruff linting step completed"
 
       - name: Run type checking
-        run: |
+        run: mypy src/
-          echo "Running mypy type check..."
-          mypy depnav/src/ || echo "Mypy check failed with exit code $?"
-          echo "Mypy completed successfully"
 
   build:
     needs: test