fix: simplify pytest command in CI workflow

Author: yunjinqi

.github/workflows/test.yml

@@ -132,10 +132,8 @@ jobs:
         run: |
           # Verify backtrader import
           python -c "import backtrader; print(f'Backtrader imported: {backtrader.__version__}')"
-          # Run tests without parallel execution first for clearer errors
-          pytest tests/ --tb=short --timeout=300 -p no:html -p no:benchmark -x -v 2>&1 | head -500 || true
-          # Run full tests with parallel execution
-          pytest tests/ -n 4 --tb=short --timeout=600 -p no:html -p no:benchmark
+          # Run tests with parallel execution
+          pytest tests/ -n 4 --tb=short --timeout=600
 
   test-summary:
     name: Test Summary