refactor(schemas): remove NormalizedResponse backward-compat __init__; use canonical API

tests/test_minimax_provider.py

@@ -37,10 +37,11 @@ def test_minimax_credentials_template() -> None:
 def test_minimax_reasoning_extractor_used_when_caps_reasoning_true() -> None:
  """caps.reasoning=True (M2.5/M2.7) should pass the reasoning_extractor to run_with_tool_loop."""
  from src import openai_compatible as oc
+ from src.openai_schemas import UsageStats
  captured_kwargs: list[dict] = []
  def _fake_send(client, request, *, capabilities):
   captured_kwargs.append({"model": request.model})
-  return MagicMock(text="ok", tool_calls=[], usage_input_tokens=0, usage_output_tokens=0, usage_cache_read_tokens=0, usage_cache_creation_tokens=0, raw_response=None)
+  return MagicMock(text="ok", tool_calls=[], usage=UsageStats(input_tokens=0, output_tokens=0, cache_read_tokens=0, cache_creation_tokens=0), raw_response=None)
  from src.vendor_capabilities import register, VendorCapabilities
  register(VendorCapabilities(vendor='minimax', model='MiniMax-M2.5', reasoning=True))
  with patch.object(oc, "send_openai_compatible", side_effect=_fake_send), \
@@ -52,17 +53,18 @@ def test_minimax_reasoning_extractor_used_when_caps_reasoning_true() -> None:
 def test_minimax_reasoning_extractor_omitted_when_caps_reasoning_false() -> None:
  """caps.reasoning=False (M2/M2.1) should NOT pass the reasoning_extractor (avoid useless getattr)."""
  from src import openai_compatible as oc
+ from src.openai_schemas import UsageStats
  from src.vendor_capabilities import register, VendorCapabilities
  register(VendorCapabilities(vendor='minimax', model='MiniMax-M2', reasoning=False))
  captured_kwargs: list[dict] = []
  def _fake_send(client, request, *, capabilities):
   captured_kwargs.append({"model": request.model})
-  return MagicMock(text="ok", tool_calls=[], usage_input_tokens=0, usage_output_tokens=0, usage_cache_read_tokens=0, usage_cache_creation_tokens=0, raw_response=None)
+  return MagicMock(text="ok", tool_calls=[], usage=UsageStats(input_tokens=0, output_tokens=0, cache_read_tokens=0, cache_creation_tokens=0), raw_response=None)
  with patch.object(oc, "send_openai_compatible", side_effect=_fake_send), \
       patch("src.ai_client._ensure_minimax_client", return_value=MagicMock()), \
       patch("src.ai_client._get_deepseek_tools", return_value=[]):
   ai_client._send_minimax("system", "user", ".", None, "", False, None, None, None)
- assert len(captured_kwargs) >= 1
+ assert len(captured_kwargs) >= 1 
 
 def test_minimax_ensure_client_instantiation() -> None:
  """Verify that _ensure_minimax_client instantiates the OpenAI client with correct credentials and base URL."""