Log KIS API responses and handle zero current price fallback

- Add debug logging of full KIS API responses for better traceability.
- Introduce fallback to `base` price when `last` (current price) is zero; log warnings accordingly.
- Update overseas stock price handling logic to use corrected current price values.
- Add `repro_kis_price.py` script for debugging and testing KIS API price retrieval.

Author: robin-watcha

app/services/kis.py

@@ -985,6 +985,9 @@ async def inquire_overseas_price(
         if not out:
             return pd.DataFrame(columns=["code", "date", "time", "open", "high", "low", "close", "volume"])
 
+        # 디버깅을 위해 전체 응답 로깅
+        logging.debug(f"해외주식 현재가 API 응답 ({symbol}): {out}")
+
         # 현재 시간 정보
         now = datetime.datetime.now()
 
@@ -1005,14 +1008,24 @@ def safe_int(val, default=0):
             except (ValueError, TypeError):
                 return default
 
+        # 현재가(last)가 0이면 전일종가(base)를 사용
+        current_price = safe_float(out.get("last"))
+        if current_price == 0:
+            base_price = safe_float(out.get("base"))
+            if base_price > 0:
+                logging.warning(f"현재가가 0이어서 전일종가를 사용합니다 ({symbol}): {base_price}")
+                current_price = base_price
+            else:
+                logging.warning(f"현재가와 전일종가 모두 0입니다 ({symbol})")
+
         row = {
             "code": symbol,
             "date": pd.Timestamp(now.date()),  # Timestamp로 변환하여 일봉 데이터와 타입 일치
             "time": now.time(),
             "open": safe_float(out.get("open")),
             "high": safe_float(out.get("high")),
             "low": safe_float(out.get("low")),
-            "close": safe_float(out.get("last")),  # 현재가
+            "close": current_price,  # 수정된 현재가
             "volume": safe_int(out.get("tvol")),
             "value": 0,  # 해외주식은 거래대금 정보 없음
         }

repro_kis_price.py

@@ -0,0 +1,33 @@
+import asyncio
+import logging
+import sys
+import os
+
+# Add project root to path
+sys.path.append(os.getcwd())
+
+from app.services.kis import KISClient
+from app.core.config import settings
+
+# Configure logging
+logging.basicConfig(level=logging.INFO)
+
+async def main():
+    kis = KISClient()
+    symbol = "CONY"
+    
+    print(f"Fetching price for {symbol}...")
+    try:
+        # Call the low-level inquire method to get the DataFrame
+        df = await kis.inquire_overseas_price(symbol)
+        print("\nDataFrame result:")
+        print(df)
+        
+        if not df.empty:
+            print(f"\nClose price: {df.iloc[0]['close']}")
+            
+    except Exception as e:
+        print(f"Error: {e}")
+
+if __name__ == "__main__":
+    asyncio.run(main())