fix(ws): KIS/키움 WS·조건검색 안정화 및 매도시세 폴백

WS 매니저 spill·조건검색 CNSR 회복·kiwoom_ws_diag 진단 경로를 보강한다.
live_sell_price stale RAM/REST 폴백 정합을 유지한다.

Co-authored-by: Cursor <cursoragent@cursor.com>

kis_trader/engine/live_sell_price.py

@@ -12,7 +12,7 @@ import threading
 import time
 from typing import Any, Callable, Optional, Tuple
 
-from kis_trader.utils.env import get_env_float
+from kis_trader.utils.env import get_env_bool, get_env_float
 
 
 _stale_rest_lock = threading.Lock()
@@ -196,6 +196,7 @@ def resolve_live_sell_price(
     is_eod: bool = False,
     fallback_price: float = 0.0,
     logger: Any = None,
+    allow_kiwoom_rest: Optional[bool] = None,
 ) -> Tuple[float, str]:
     """
     실매 매도용 현재가.
@@ -210,6 +211,8 @@ def resolve_live_sell_price(
     cooldown = float(get_env_float("SELL_WS_STALE_REST_COOLDOWN_SEC", 30.0) or 0.0)
     if cooldown < 1.0:
         cooldown = 1.0
+    if allow_kiwoom_rest is None:
+        allow_kiwoom_rest = bool(get_env_bool("SELL_SCAN_ALLOW_KIWOOM_REST", False))
     _ = inquire_price  # 한투 경로 사용 금지 (시그니처 유지)
 
     if is_eod:
@@ -217,7 +220,7 @@ def resolve_live_sell_price(
         if ws_px > 0:
             _remember_last_good(code, ws_px, "WS")
             return ws_px, "WS"
-        if stale_sec > 0 and _stale_rest_allowed(code, cooldown):
+        if allow_kiwoom_rest and stale_sec > 0 and _stale_rest_allowed(code, cooldown):
             rest_px = _kiwoom_rest_once(ws, code)
             if rest_px > 0:
                 return rest_px, "kiwoom_rest"
@@ -276,7 +279,7 @@ def resolve_live_sell_price(
         )
         return cached_px, cached_src + "_cached"
 
-    if stale_sec > 0 and _stale_rest_allowed(code, cooldown):
+    if allow_kiwoom_rest and stale_sec > 0 and _stale_rest_allowed(code, cooldown):
         rest_px = _kiwoom_rest_once(ws, code)
         if rest_px > 0:
             _remember_last_good(code, rest_px, "kiwoom_rest")