Fix CI workflow: Add pytest-cov dependency

- Add pytest-cov to dev dependencies in pyproject.toml
- Update CI workflow to use proper coverage reporting
- Tests now run successfully with coverage metrics

Author: dknell

.coverage

@@ -30,7 +30,7 @@ jobs:
       run: uv sync --all-extras --dev
 
     - name: Run tests
-      run: uv run pytest --cov=system_info_mcp --cov-report=xml
+      run: uv run pytest --cov=system_info_mcp --cov-report=term-missing
 
     - name: Run linting
       run: uv run ruff check src/ tests/

.github/workflows/ci.yml

@@ -49,5 +49,6 @@ dev = [
     "mypy>=1.16.1",
     "pytest>=8.4.1",
     "pytest-asyncio>=1.0.0",
+    "pytest-cov>=4.0.0",
     "ruff>=0.12.1",
 ]