refactor: separa composição OCI e inicialização do DeepAgents

tests/test_deep_agent_stream.py

@@ -111,18 +111,9 @@ def test_timeout_is_renewed_for_each_next_event():
 
 
 @pytest.mark.parametrize("timeout", [0, -1, float("inf"), float("nan"), True, "60", None])
-def test_invalid_timeout_fails_before_model_construction(monkeypatch, timeout):
-    import voice_assistant.agent.deep_agent as module
-
-    def unexpected_model(**kwargs):
-        pytest.fail("Invalid configuration must not create a model")
-
-    monkeypatch.setattr(module, "ChatOCIGenAI", unexpected_model)
+def test_invalid_stream_timeout_is_rejected(timeout):
     with pytest.raises(ValueError, match="finite and positive"):
-        DeepAgentsAdapter(
-            region="sa-vinhedo-1", compartment_id="test", model_id="test",
-            temperature=0.3, max_completion_tokens=256, timeout_seconds=timeout,
-        )
+        DeepAgentsAdapter(graph=SimpleNamespace(), timeout_seconds=timeout)
 
 
 def test_adapter_streams_real_deepagents_graph_with_fake_model():