test: add infrastructure integration tests for pypi_proxy

backend/tests/integration/test_pypi_proxy.py

@@ -135,3 +135,18 @@ class TestPyPIPackageNormalization:
                     assert "text/html" in response.headers.get("content-type", "")
                 elif response.status_code == 503:
                     assert "No PyPI upstream sources configured" in response.json()["detail"]
+
+
+class TestPyPIProxyInfrastructure:
+    """Tests for PyPI proxy infrastructure integration."""
+
+    @pytest.mark.integration
+    def test_health_endpoint_includes_infrastructure(self, integration_client):
+        """Health endpoint should report infrastructure status."""
+        response = integration_client.get("/health")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["status"] == "healthy"
+        # Infrastructure status may include these if implemented
+        # assert "infrastructure" in data