feat(execution): AccountOrderWorker로 매수·매도 주문 직렬화

전략별 tick/scan 매도 락 대신 계좌 단일 PriorityQueue로 place를 B-full 직렬화한다.
틱매도 only_code 필터와 inflight 중복 enqueue 방지로 REST 폭주를 줄인다.

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

kis_trader/main.py

@@ -70,6 +70,7 @@ from .database.db_manager import get_db
 from .execution.kis_client import KISClient
 from .execution.account_cash import AccountCashLedger
 from .execution.order_manager import OrderManager
+from .execution.order_worker import AccountOrderWorker
 from .network.condition_manager import ConditionSearchManager
 from .network.kiwoom_condition_manager import KiwoomConditionSearchManager
 from .network.ls_condition_manager import (
@@ -189,6 +190,7 @@ class TradingOrchestrator:
         self.order_mgr = OrderManager(
             client=self.client, db=self.db, cash_ledger=self.cash_ledger,
         )
+        self.order_worker = AccountOrderWorker(self.order_mgr)
         self.ws = WSManager(db=self.db, kis_client=self.market_client)
         # 해외(US) 실시간(지연)체결가 수신기 — 국내 WS와 분리된 별도 인스턴스(야간 가동).
         # permanent_subscriptions 테이블의 US 종목을 HDFSCNT0 로 구독. start()에서 기동.
@@ -380,7 +382,7 @@ class TradingOrchestrator:
                     if buy_price > 0 and px > 0:
                         profit_pct = (px - buy_price) / buy_price * 100.0
                     try:
-                        strat._submit_sell({
+                        strat._enqueue_sell({
                             "code": code,
                             "name": (row or {}).get("name") or h.get("name") or code,
                             "qty": qty,
@@ -389,7 +391,7 @@ class TradingOrchestrator:
                             "buy_price": buy_price,
                             "profit_pct": profit_pct,
                             "reason": reason,
-                        })
+                        }, source="halt")
                     except Exception as ex:
                         logger.warning(
                             "⚠️ [리스크버짓] %s %s 청산 실패: %s", sid_u, code, ex,
@@ -723,6 +725,10 @@ class TradingOrchestrator:
         self._register_strategies()
         # 해외 WS 는 등록 전에 기동됨 → 여기서 US_MOMENTUM 에 핸들 주입
         self._attach_overseas_ws_to_strategies()
+        for strat in self.strategies:
+            self.order_worker.register_strategy(strat)
+            strat.order_worker = self.order_worker
+        self.order_worker.start()
         for strat in self.strategies:
             strat.start()  # threading.Thread.start()
             logger.info("▶ 쓰레드 기동: %s", strat.name)
@@ -2666,6 +2672,8 @@ class TradingOrchestrator:
             )
             if getattr(ns, "strategy_id", "") == "US_MOMENTUM" and self.overseas_ws:
                 ns.overseas_ws = self.overseas_ws
+            ns.order_worker = self.order_worker
+            self.order_worker.register_strategy(ns)
             ns.start()
             new_list.append(ns)
             logger.info("🔁 전략 재기동: %s", ns.name)
@@ -2734,6 +2742,10 @@ class TradingOrchestrator:
     def stop(self) -> None:
         for s in self.strategies:
             s.stop_loop()
+        try:
+            self.order_worker.stop()
+        except Exception:
+            pass
         for s in self.strategies:
             try:
                 s.join(timeout=5)
@@ -2802,6 +2814,13 @@ class TradingOrchestrator:
 
 
 def main() -> None:
+    import faulthandler
+    import signal
+    faulthandler.enable()
+    try:
+        faulthandler.register(signal.SIGUSR1, all_threads=True, chain=False)
+    except:
+        pass
     orch = TradingOrchestrator()
     try:
         orch.start()