feat(perf): Expand instrumentation with context manager and extended metrics

tests/test_performance_monitor.py

@@ -26,3 +26,57 @@ def test_perf_monitor_component_timing() -> None:
  metrics = pm.get_metrics()
  assert metrics['time_test_comp_ms'] >= 10.0
  pm.stop()
+
+def test_perf_monitor_scope_context_manager() -> None:
+ pm = PerformanceMonitor()
+ pm.enabled = True
+ 
+ # Test normal usage
+ with pm.scope("test_scope"):
+  time.sleep(0.01)
+ 
+ metrics = pm.get_metrics()
+ assert metrics['time_test_scope_ms'] >= 10.0
+ 
+ # Test exception handling
+ try:
+  with pm.scope("test_error"):
+   time.sleep(0.01)
+   raise ValueError("test error")
+ except ValueError:
+  pass
+ 
+ metrics = pm.get_metrics()
+ # Component should still be finished, so timing should be recorded
+ assert metrics['time_test_error_ms'] >= 10.0
+ 
+ pm.stop()
+
+def test_perf_monitor_extended_metrics() -> None:
+ pm = PerformanceMonitor()
+ pm.enabled = True
+ 
+ # 1st call: 10ms
+ pm.start_component("test_comp")
+ time.sleep(0.01)
+ pm.end_component("test_comp")
+ 
+ # 2nd call: 30ms
+ pm.start_component("test_comp")
+ time.sleep(0.03)
+ pm.end_component("test_comp")
+ 
+ # 3rd call: 20ms
+ pm.start_component("test_comp")
+ time.sleep(0.02)
+ pm.end_component("test_comp")
+ 
+ metrics = pm.get_metrics()
+ assert metrics['count_test_comp'] == 3.0
+ assert metrics['max_test_comp_ms'] >= 30.0
+ assert metrics['min_test_comp_ms'] >= 10.0
+ assert metrics['min_test_comp_ms'] < 20.0
+ 
+ pm.stop()
+
+