test(extractor): clear active_connections before health data test

Fix test failure caused by residual state from parallel test execution.
The test_get_health_data test was failing intermittently because the
global active_connections dictionary retained entries from other tests
running in parallel (pytest-xdist), causing the health status to be
"extracting" instead of "healthy".

Solution: Clear active_connections.clear() before checking health data
to ensure clean test isolation.

Fixes: tests/extractor/test_extractor.py::TestHealthMonitoring::test_get_health_data

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: SimplicityGuy

tests/extractor/test_extractor.py

@@ -943,8 +943,12 @@ class TestHealthMonitoring:
 
     def test_get_health_data(self) -> None:
         """Test getting health data."""
+        import extractor.pyextractor.extractor
         from extractor.pyextractor.extractor import get_health_data
 
+        # Clear any residual state from parallel tests
+        extractor.pyextractor.extractor.active_connections.clear()
+
         health = get_health_data()
 
         assert "status" in health