feat: Add DART strategy and related configurations

ㅇ
Changes:
- Introduced the DART strategy to the trading system, including its configuration and integration into the existing framework.
- Updated the database schema to include DART-specific tables for disclosures and watchlists.
- Enhanced the backtesting and parameter search functionalities to support the DART strategy.
- Implemented new rules for browser verification and API interactions to ensure compliance with the updated DART strategy.

Impact:
- These additions expand the trading capabilities of the system, allowing for more comprehensive analysis and execution of DART-related strategies, while maintaining system integrity and performance.

kis_trader/ws/kis_ws_overseas.py

@@ -208,6 +208,9 @@ class KISOverseasWebSocket:
         if self._running:
             return True
         if force_cleanup:
+            # 원래 동작: 재기동 시 메모리 approval 비우고 재발급 (국내 공유 매니저 미사용)
+            self._approval_key = None
+            self._approval_key_ts = 0.0
             with self._cache_lock:
                 self._cache.clear()
         if not self._get_approval_key():
@@ -237,24 +240,28 @@ class KISOverseasWebSocket:
     # 내부: approval_key / 구독 메시지 / 파싱
     # ==================================================================
     def _get_approval_key(self) -> Optional[str]:
-        """국내 WS 와 동일 approval_key 파일 캐시 공유 (6h/24h KIS 정책)."""
+        """해외 전용 REST approval 발급 (국내 공유 매니저·정합성 freeze 와 무관)."""
+        now = time.time()
+        if self._approval_key and (now - self._approval_key_ts) < self.APPROVAL_KEY_CACHE_SEC:
+            return self._approval_key
         try:
-            from kis_approval_manager import KISApprovalManager
-        except ImportError as exc:
-            logger.error("kis_approval_manager import 실패: %s", exc)
-            return None
-        mgr = KISApprovalManager.instance(self.is_mock)
-        key = mgr.get_approval_key(
-            self.app_key,
-            self.app_secret,
-            self._base_url,
-            force_refresh=False,
-        )
-        if key:
-            self._approval_key = key
-            self._approval_key_ts = mgr.issued_ts or time.time()
-            logger.debug("🔑 해외 WS approval_key 공유 (앞8자: %s…)", key[:8])
-        return key
+            url = f"{self._base_url}/oauth2/Approval"
+            body = {
+                "grant_type": "client_credentials",
+                "appkey": self.app_key,
+                "secretkey": self.app_secret,
+            }
+            r = requests.post(url, json=body, timeout=10)
+            key = r.json().get("approval_key")
+            if key:
+                self._approval_key = key
+                self._approval_key_ts = now
+                logger.info("✅ 해외 WS approval_key 발급 완료 (앞8자: %s…)", key[:8])
+                return key
+            logger.error("❌ 해외 WS approval_key 발급 실패: %s", r.text[:200])
+        except Exception as e:
+            logger.error("❌ 해외 WS approval_key 요청 예외: %s", e)
+        return None
 
     def _build_sub_payload(self, tr_key: str, subscribe: bool) -> str:
         return json.dumps({