feat(옵투나·웹): 후처리 재탐색·ob_modes·적용감사·수집통계

- Optuna web jobs/TPE/apply snapshot·틱로더 정합, jobs limit·감사로그
- 백테 UI 호가모드·후보 적용 흐름, feed_collect_stats API/탭
- 가설검증·교차검증 룰, 4전략 스모크·OB slot41 진단 스크립트

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

kis_trader/backtest/breakout_tick_loader.py

@@ -8,7 +8,7 @@ from collections import defaultdict
 from datetime import datetime, timedelta
 from typing import Any, Dict, Iterator, List, Optional, Set, Tuple
 
-from ..utils.env import get_env_from_db, get_env_int
+from ..utils.env import get_env_bool, get_env_from_db, get_env_int
 from ..utils.logger import get_logger
 
 logger = get_logger("kis_trader.breakout_tick_loader")
@@ -266,6 +266,37 @@ def load_breakout_ticks_by_code(
             )
 
     if total <= 0:
+        # ws_ticks 비어도 LS 3차만으로 재생 가능 (1·2차 공백일)
+        if mkt != "US" and get_env_bool("BT_TICK_LS_THIRD_FALLBACK", True):
+            try:
+                from kis_trader.backtest.ls_history_loaders import load_ls_ticks_by_code
+                from kis_trader.engine.feed_fallback import merge_ls_ticks_third_fallback
+
+                ls_map, ls_raw = load_ls_ticks_by_code(db, start_key, end_key, codes)
+                if ls_raw > 0:
+                    added = merge_ls_ticks_third_fallback(out, ls_map)
+                    if added:
+                        logger.info(
+                            "📌 틱 3차 LS만 로드: ls_raw=%s → kept=%s (ws_ticks 0)",
+                            f"{ls_raw:,}",
+                            f"{added:,}",
+                        )
+                        try:
+                            from kis_trader.backtest.optuna_feed_trace import log_bt_tick_feed_trace
+                            from kis_trader.engine.feed_fallback import live_tick_primary
+
+                            log_bt_tick_feed_trace(
+                                dict(out),
+                                table="ls_ws_ticks",
+                                main_src=live_tick_primary(),
+                                raw_total=ls_raw,
+                                context="틱로드(LS만)",
+                            )
+                        except Exception:
+                            pass
+                        return dict(out), int(added)
+            except Exception as e:
+                logger.debug("틱 LS-only 로드 스킵: %s", e)
         logger.warning(
             "%s 조회 실패 — OHLC 폴백만 사용: 0건 (failed_days=%s/%s)",
             table, failed_days, len(chunks),
@@ -279,7 +310,11 @@ def load_breakout_ticks_by_code(
         )
 
     # 일별 SELECT 에 ORDER BY 없음 → 분봉 버킷 시간순 정렬 (틱 재생 정합)
-    from kis_trader.engine.feed_fallback import live_tick_primary, merge_ticks_time_axis_fallback
+    from kis_trader.engine.feed_fallback import (
+        live_tick_primary,
+        merge_ls_ticks_third_fallback,
+        merge_ticks_time_axis_fallback,
+    )
 
     main_src = live_tick_primary() if mkt != "US" else "kis"
     kept = 0
@@ -294,12 +329,30 @@ def load_breakout_ticks_by_code(
                 kept += len(ticks)
     if kept != total:
         logger.info(
-            "📌 틱 시간축 폴백: raw=%d → kept=%d (같은 초 메인 우선, 메인 lag>2s면 보조)",
+            "📌 틱 시간축 폴백: raw=%d → kept=%d (같은 초 메인 우선, 메인 lag>나이면 보조)",
             total, kept,
         )
     raw_before_merge = total
     total = kept
 
+    # 실매 3차 LS: 같은 초에 1·2차 없으면 ls_ws_ticks (나이=LIVE_FEED_FALLBACK, 기본 3초)
+    if mkt != "US" and get_env_bool("BT_TICK_LS_THIRD_FALLBACK", True):
+        try:
+            from kis_trader.backtest.ls_history_loaders import load_ls_ticks_by_code
+
+            ls_map, ls_raw = load_ls_ticks_by_code(db, start_key, end_key, codes)
+            if ls_raw > 0:
+                added = merge_ls_ticks_third_fallback(out, ls_map)
+                total += int(added or 0)
+                if added:
+                    logger.info(
+                        "📌 틱 3차 LS 폴백: ls_raw=%s → +%s초 (메인·2차 빈 초만)",
+                        f"{ls_raw:,}",
+                        f"{added:,}",
+                    )
+        except Exception as e:
+            logger.debug("틱 3차 LS 폴백 스킵: %s", e)
+
     # 옵투나/백테: 틱 벤더(kis|kiwoom|ls) 비율 — 실매 트리거 피드 추적과 동일 축
     try:
         from kis_trader.backtest.optuna_feed_trace import log_bt_tick_feed_trace