feat: Enhance trading system with new e_min_chg_pct parameter and related logic

Changes:
- Introduced the `e_min_chg_pct` parameter to define the minimum price change percentage compared to the previous day's close, enhancing the momentum trading strategy.
- Updated various functions and classes to incorporate this new parameter, ensuring it is utilized in both backtesting and live trading scenarios.
- Improved documentation and comments to clarify the purpose and usage of the new parameter across the codebase.

Impact:
- This addition allows for more precise control over trading conditions, potentially increasing the effectiveness of the momentum strategy while maintaining system integrity and performance.

kis_trader/backtest/optuna_web_jobs.py

@@ -939,12 +939,14 @@ def start_optuna_job(
     trials: int = 200,
     mode: str = "tpe",
     symbol: Optional[str] = None,
+    universe_history_source: Optional[str] = None,
 ) -> Dict[str, Any]:
     """
     subprocess 로 Optuna 시작. apply-best 없음.
     전략 2개 이상 → scripts/run_optuna_4strat_tpe_seq.sh + STRATEGIES=
     (레거시 strategy='all' → 국내 4순차, 해외 미포함)
     symbol: us_momentum 종목 cfg Optuna (1종목 유니버스). 순차잡과 병행 불가.
+    universe_history_source: kiwoom|ls (저장 후보 이력 테이블).
     """
     _ensure_dirs()
     running = find_running_jobs()
@@ -972,8 +974,12 @@ def start_optuna_job(
         if len(picked) != 1 or picked[0] != "us_momentum":
             raise ValueError("종목 Optuna(--symbol)는 us_momentum 단독만 가능")
 
+    from kis_trader.backtest.universe_history_source import (
+        resolve_backtest_universe_history_source,
+    )
     from kis_trader.utils.kr_trading_day import clamp_to_prev_kr_trading_day
 
+    hist_src = resolve_backtest_universe_history_source(universe_history_source)
     start = clamp_to_prev_kr_trading_day(start)
     end = clamp_to_prev_kr_trading_day(end)
     if start > end:
@@ -984,6 +990,7 @@ def start_optuna_job(
 
     env = os.environ.copy()
     env["PYTHONUNBUFFERED"] = "1"
+    env["BACKTEST_UNIVERSE_HISTORY_SOURCE"] = hist_src
 
     _labels = {
         "momentum": "모멘텀",
@@ -1009,6 +1016,7 @@ def start_optuna_job(
         env["MIN_PF"] = "0"
         env["MIN_TRADES"] = "1"
         env["STRATEGIES"] = " ".join(picked)
+        env["UNIVERSE_HISTORY_SOURCE"] = hist_src
         kind = "seq"
         label = "순차(" + "+".join(_labels.get(s, s) for s in picked) + ")"
         strat_field = ",".join(picked)
@@ -1042,6 +1050,7 @@ def start_optuna_job(
             "--no-progress",
             "--study-name", study_name,
             "--sort-by", sort_by,
+            "--universe-history-source", hist_src,
         ]
         if sym and strat == "us_momentum":
             cmd.extend(["--symbol", sym])
@@ -1070,6 +1079,7 @@ def start_optuna_job(
         "trials": trials,
         "study_name": study_name,
         "symbol": sym or None,
+        "universe_history_source": hist_src,
         "log_path": str(log_path),
         "pid": int(proc.pid),
         "status": "running",