Add test for optimization recommendations on non-Apple Silicon

[m-marinucci]

As suggested in PR #1 by @sourcery-ai[bot]:

No test exists for get_optimization_recommendations when not Apple Silicon.

Task: Add a test case where _detect_apple_silicon returns False to verify correct recommendations for non-Apple Silicon systems.

Suggested implementation:

def test_get_optimization_recommendations_non_apple_silicon(self):
    """Test recommendations for non-Apple Silicon systems."""
    with patch.object(MacOptimizer, '_gather_system_info', return_value={}):
        with patch.object(MacOptimizer, '_detect_apple_silicon', return_value=False):
            with patch.object(MacOptimizer, '_detect_unified_memory', return_value={'has_unified_memory': False, 'total_memory_gb': 16}):
                with patch.object(MacOptimizer, '_get_cpu_details', return_value={'logical_cores': 8}):
                    with patch.object(MacOptimizer, '_get_gpu_details', return_value={'metal_support': False}):
                        optimizer = MacOptimizer()
                        recommendations = optimizer.get_optimization_recommendations()
                        
                        assert recommendations['use_unified_memory'] is False
                        assert 'Use OpenCL or CUDA for GPU compute' in recommendations['architecture_specific']

File: tests/test_mac_optimizer.py