엔진 게이트웨이 계약 고정

apps/api/engine_gateway/gateway.py

@@ -25,6 +25,7 @@ from app.contracts.engine_gateway import (
     ENGINE_GATEWAY_SSE_ERROR,
     ENGINE_GATEWAY_SSE_TOKEN,
     EngineMessage as GwMessage,
+    GenerateResponse,
     GenerateRequest as GwGenerateReq,
     StreamDoneEvent,
     StreamErrorEvent,
@@ -419,16 +420,16 @@ async def v1_generate(req: GwGenerateReq):
             structured = json.loads(text)
         except (json.JSONDecodeError, TypeError):
             structured = None  # 파싱 실패는 호출부가 text 로 폴백
-    return {
-        "text": text,
-        "model": s.model or DEFAULT_MODEL or "claude-opus-4-8",
-        "provider": "claude_cli",
-        "tokens_in": 0,
-        "tokens_out": 0,
-        "cost_usd": result.get("cost_usd", 0.0),
-        "inference_geo": "us",
-        "structured": structured,
-    }
+    return GenerateResponse(
+        text=text,
+        model=s.model or DEFAULT_MODEL or "claude-opus-4-8",
+        provider="claude_cli",
+        tokens_in=0,
+        tokens_out=0,
+        cost_usd=result.get("cost_usd", 0.0),
+        inference_geo="us",
+        structured=structured,
+    ).model_dump()
 
 
 @app.post("/v1/stream")