refactor(reasoning)!: remove Node-RED engine and integrations

BREAKING CHANGE: NODE_RED reasoning is no longer supported. Unsupported
mode values fall back to PROXY. PROXY and OPENAI remain available.

s2s-client/tests/test_models.py

@@ -24,7 +24,7 @@ from s2s_client.models.responses import (
         (AllocationResponse, {"state": [1, None], "connectUrl": "wss://host", "future": {"x": 1.0}}),
         (ToolExecutionResponse, {"success": True, "unknown": {"nested": [None, 1.0, False]}}),
         (ToolExecutionResponse, {"success": False, "data": 42, "error": "loose error", "future": []}),
-        (ReasoningResponse, {"answer": "á", "usage": [1, None], "debug": False, "future": True}),
+        (ReasoningResponse, {"answer": "á", "usage_pass2": [1, None], "future": True}),
         (SearchResponse, {"query": "q", "answer": {"x": 2}, "results": [{"title": [], "snippet": 7, "url": None}]}),
         (
             ReportsResponse,
@@ -69,3 +69,22 @@ def test_http_routes_publish_response_schemas():
     allocation = spec["components"]["schemas"]["AllocationResponse"]
     assert not allocation.get("required")
     assert allocation["additionalProperties"] is True
+    config = spec["components"]["schemas"]["ConfigResponse"]
+    assert config["properties"]["reasoningType"]["enum"] == ["PROXY", "OPENAI"]
+
+
+@pytest.mark.parametrize(
+    ("value", "expected"),
+    [
+        ("OPENAI", "OPENAI"),
+        (" 'openai' ", "OPENAI"),
+        ('"OPENAI"', "OPENAI"),
+        ("PROXY", "PROXY"),
+        ("", "PROXY"),
+        ("UNSUPPORTED", "PROXY"),
+    ],
+)
+def test_reasoning_configuration_preserves_normalization_and_native_fallback(value, expected):
+    from s2s_client.core.config import _normalize_reasoning_type
+
+    assert _normalize_reasoning_type(value) == expected