fix(health): support HEAD method for health endpoint

tests/integration/test_health.py

@@ -60,6 +60,15 @@ class TestHealthEndpoint:
 
             assert response.status_code == 200
 
+    def test_health_check_head_method(self, test_app):
+        """Test health check endpoint supports HEAD requests."""
+        with TestClient(test_app) as client:
+            response = client.head("/health")
+
+            assert response.status_code == 200
+            # HEAD requests should not have a response body
+            assert len(response.content) == 0
+
     def test_root_endpoint(self, test_app):
         """Test root endpoint returns service information."""
         client = TestClient(test_app)