fix(시세): LS spill-only·토큰 파일캐시·호가 snap_time 3초컷

- _feed_fallback 미러 OFF, LS cap/grace/hold RAM을 KIS·키움 spill과 정합
- LS 접근토큰 .ls_token_cache_*.json (재시작 재사용, revoke 루프 없음)
- 호가 RAM을 틱과 동일 LIVE_FEED_FALLBACK(snap_time)로 컷, 필터 max_age=0은 유지
- 익절 지정가 로그에 실제 호가 벤더(kis/kiwoom/ls 1·2·3차) 표기

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

kis_trader/ws/kiwoom_ws.py

@@ -58,6 +58,8 @@ from typing import Any, Callable, Dict, Iterable, List, Optional, Set
 
 logger = logging.getLogger("KiwoomWebSocket")
 
+from .ws_reconnect_backoff import ws_reconnect_delay_for_attempt
+
 
 # ── 환경변수 헬퍼 (KIS WS 와 동일 패턴, fallback 포함) ────────────────────
 try:
@@ -130,9 +132,7 @@ class KiwoomWebSocketPriceCache:
     SUB_TYPE_ORDERBOOK = "0D"  # 주식호가잔량
     SUB_TYPE_PROGRAM = "0w"  # 종목프로그램매매
 
-    # 재연결 정책
-    RECONNECT_BASE_DELAY_SEC = 5.0
-    RECONNECT_MAX_DELAY_SEC  = 300.0
+    # 재연결 sleep — ws_reconnect_backoff (기본 1,3,5,7,10초)
     MAX_RECONNECTS_PER_HOUR  = 6
     MAX_RECONNECT_ATTEMPTS   = 10
     STABLE_CONN_RESET_SEC    = 300.0  # 5분 안정 연결 후 끊기면 카운터 초기화
@@ -194,7 +194,6 @@ class KiwoomWebSocketPriceCache:
         # 재연결 추적
         self._reconnect_count = 0
         self._reconnect_times: list = []
-        self._reconnect_delay = self.RECONNECT_BASE_DELAY_SEC
         self._last_connect_time: float = 0.0
 
         # REG 레이트리밋 회피: 단건 subscribe 는 디바운스 후 묶어 전송
@@ -683,7 +682,6 @@ class KiwoomWebSocketPriceCache:
                 self._authenticated = True
                 # 안정 LOGIN 성공 → 재연결 카운터 리셋 (주말 Bye 후 소모분 복구)
                 self._reconnect_count = 0
-                self._reconnect_delay = self.RECONNECT_BASE_DELAY_SEC
                 logger.info("✅ 키움 WS LOGIN OK")
                 # 디바운스 타이머 취소 — LOGIN 직후 일괄 REG 와 이중 전송 방지
                 with self._reg_timer_lock:
@@ -756,7 +754,7 @@ class KiwoomWebSocketPriceCache:
             elif sub_type == self.SUB_TYPE_ORDERBOOK and self._orderbook_cache:
                 try:
                     snap = self._orderbook_cache.update_from_kiwoom_0d(code, values)
-                    if self._trigger_snapshot_recorder is not None:
+                    if snap is not None and self._trigger_snapshot_recorder is not None:
                         tt = str(values.get("20") or values.get(self.FID_TICK_TIME) or "").strip()
                         self._trigger_snapshot_recorder.on_orderbook(snap, snap_time=tt or None)
                 except Exception as ex:
@@ -1075,7 +1073,6 @@ class KiwoomWebSocketPriceCache:
         if (self._last_connect_time > 0
                 and now - self._last_connect_time >= self.STABLE_CONN_RESET_SEC):
             self._reconnect_count = 0
-            self._reconnect_delay = self.RECONNECT_BASE_DELAY_SEC
 
         # 시간당 한도 초과 → 1시간 대기
         cutoff = now - 3600
@@ -1105,14 +1102,13 @@ class KiwoomWebSocketPriceCache:
             self._invalidate_token_cache("max reconnect cooldown")
             time.sleep(cool)
             self._reconnect_count = 0
-            self._reconnect_delay = self.RECONNECT_BASE_DELAY_SEC
             self._reconnect_times.clear()
             return
 
-        delay = min(self._reconnect_delay, self.RECONNECT_MAX_DELAY_SEC)
+        attempt = self._reconnect_count + 1
+        delay = ws_reconnect_delay_for_attempt(attempt)
         logger.info("⏳ 키움 WS %ds 후 재연결 시도 (#%d)",
-                    int(delay), self._reconnect_count + 1)
+                    int(delay), attempt)
         time.sleep(delay)
         self._reconnect_times.append(time.time())
         self._reconnect_count += 1
-        self._reconnect_delay = min(self._reconnect_delay * 2, self.RECONNECT_MAX_DELAY_SEC)