feat: Enhance Optuna integration and logging for backtesting framework

Changes:
- Added new API endpoints for continuing and confirming Optuna jobs, allowing for better management of ongoing studies.
- Introduced detailed logging for tick feed tracking and order book processing, improving traceability of vendor performance during backtests.
- Updated database schema to include new fields for managing Optuna study results, enhancing the ability to track study progress and outcomes.
- Refactored existing functions to utilize the new logging and tracking features, ensuring consistency across the backtesting framework.

Impact:
- These enhancements improve the robustness and transparency of the Optuna backtesting process, facilitating better analysis and optimization of trading strategies.

kis_trader/backtest/param_search_momentum.py

@@ -1814,15 +1814,14 @@ def _load_candles_for_search(
             if str(c).strip()
         }
 
-        from kis_trader.backtest.bt_candle_source import (
-            fetch_ws_candles_for_code,
-            list_ws_candle_codes,
-        )
+        from kis_trader.backtest.bt_candle_source import fetch_ws_candles_by_code_bulk
 
-        codes = list_ws_candle_codes(
+        loaded = fetch_ws_candles_by_code_bulk(
             db, 1, start_key, end_key,
             market=mk if mk in ("US", "KR") else None,
+            confirmed_only=True,
         )
+        codes = list(loaded.keys())
         if mk == "US":
             try:
                 from permanent_subs import codes_by_market as _perm_us
@@ -1834,13 +1833,10 @@ def _load_candles_for_search(
         if want:
             codes = [c for c in codes if str(c).upper() in want]
 
+        min_bars = int(rsi_period) + 5
         for code in codes:
-            rows = fetch_ws_candles_for_code(
-                db, code, 1, start_key, end_key,
-                market=mk if mk in ("US", "KR") else None,
-                confirmed_only=True,
-            )
-            if len(rows) < rsi_period + 5:
+            rows = loaded.get(code) or []
+            if len(rows) < min_bars:
                 continue
             codes_candles[code] = rows
         if codes_candles: