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feat: Implement backtest source management and enhance candle data handling

Changes:
- Introduced a new function `_apply_backtest_source_env_from_request` to manage the environment variables for candle, tick, and order book sources based on incoming requests.
- Added a teardown function `_teardown_backtest_source_env` to ensure that environment variables do not persist between requests, enhancing the stability of the backtesting environment.
- Refactored existing code to utilize the new source management functions, improving code readability and maintainability.
- Added new utility functions in `bt_candle_source.py` for fetching and managing candle data, ensuring consistency with live trading data sources.

Impact:
- These changes improve the flexibility and reliability of the backtesting framework, allowing for better management of data sources and reducing the risk of cross-request contamination.

kis_trader/execution/order_manager.py

@@ -158,6 +158,23 @@ class OrderManager:
         self.strategy_pnl_provider: Optional[Callable[..., tuple]] = None
         # 호가 조회 — WSManager.get_orderbook 등 (키움 0D 캐시 우선)
         self.orderbook_provider: Optional[Callable[..., Optional[dict]]] = None
+        # 체결 알림 시세 표기 — WSManager.get_tick_feed_label(code) -> str
+        self.tick_feed_label_provider: Optional[Callable[[str], str]] = None
+
+    def _tick_feed_mm_line(self, code: str) -> str:
+        """매수/매도 MM 한 줄: 시세: kiwoom | kis | ls(spill)."""
+        try:
+            if self.tick_feed_label_provider is not None:
+                lab = (self.tick_feed_label_provider(code) or "").strip()
+                if lab:
+                    return f"시세: {lab}"
+        except Exception as e:
+            logger.debug("tick_feed_label_provider 실패: %s", e)
+        try:
+            lab = (get_env_from_db("LIVE_TICK_PROVIDER", "kiwoom") or "kiwoom").strip().lower()
+            return f"시세: {lab}"
+        except Exception:
+            return "시세: ?"
 
     # ------------------------------------------------------------------
     # Lock 헬퍼
@@ -637,6 +654,7 @@ class OrderManager:
                     f"🔷 **[{log_tag}:{disp}]** {req.name}({req.code})\n"
                     f"{filled_price:,.0f}원 × {filled_qty}주 = {filled_price*filled_qty:,.0f}원\n"
                     f"손절 {req.stop_price:,.0f} / 목표 {req.target_price:,.0f}\n"
+                    f"{self._tick_feed_mm_line(req.code)}\n"
                     f"ODNO={ord_no}"
                 )
                 if prev_filled > 0:
@@ -781,6 +799,11 @@ class OrderManager:
                 realized_pnl_override=realized_pnl,
                 sell_qty=int(delta_qty),
             )
+            try:
+                from kis_trader.utils.today_trades_cache import invalidate_today_trades_cache
+                invalidate_today_trades_cache()
+            except Exception:
+                pass
             # 매수~매도 구간 1분봉 REST 백필 (백테 봉구멍·슬롯 좀비 방지) — 비동기 1회
             # 부분매도면 포지션 잔존 → 전량 청산 시에만 백필
             remain_after = self._active_qty(req.strategy_id, req.code)
@@ -823,7 +846,8 @@ class OrderManager:
                     f"{emoji} **[매도체결:{disp}]** {req.name}({req.code})\n"
                     f"{sell_price:,.0f}원 × {delta_qty}주\n"
                     f"{req.reason} · 수익률 {req.profit_pct*100:+.2f}%\n"
-                    f"실현 {pnl_str} · ODNO={ord_no}"
+                    f"실현 {pnl_str} · ODNO={ord_no}\n"
+                    f"{self._tick_feed_mm_line(req.code)}"
                 )
                 if remain_after > 0:
                     header += f"\n⚠️ 부분체결 잔량 {remain_after}주"