Add PostgreSQL production backend to eliminate SQLite lock contention.

Support DATABASE_URL with connection pooling, pg_dump backups, SQLite migration script, and deploy_postgres.sh with docs.

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

ctp_reconnect.py

@@ -12,12 +12,15 @@ import threading
 import time
 from typing import Callable
 
-from ctp_premarket_connect import should_auto_connect_now
+from ctp_premarket_connect import premarket_minutes_before, should_auto_connect_now
+from market_sessions import in_premarket_connect_window, is_trading_session
 from vnpy_bridge import ctp_try_auto_reconnect
 
 logger = logging.getLogger(__name__)
 
 RECONNECT_INTERVAL_SEC = 60
+TRADING_RECONNECT_INTERVAL_SEC = 15
+PREMARKET_RECONNECT_INTERVAL_SEC = 30
 
 
 def _auto_reconnect_enabled() -> bool:
@@ -34,17 +37,23 @@ def start_ctp_reconnect_worker(
     get_setting_fn: Callable[[str, str], str] | None = None,
     interval: int = RECONNECT_INTERVAL_SEC,
 ) -> None:
-    """定时检测 CTP 连接；仅在交易时段或盘前窗口内尝试重连，避免非交易时段反复登录。"""
+    """交易时段 / 盘前窗口内检测 CTP；断线则后台自动重连。"""
 
     def _loop() -> None:
         while True:
+            sleep_sec = max(5, interval)
             try:
                 if _auto_reconnect_enabled() and should_auto_connect_now():
                     mode = get_mode_fn()
-                    if ctp_try_auto_reconnect(mode):
-                        logger.debug("CTP 连接正常 [%s]", mode)
+                    ctp_try_auto_reconnect(mode)
+                    if is_trading_session():
+                        sleep_sec = TRADING_RECONNECT_INTERVAL_SEC
+                    elif in_premarket_connect_window(
+                        minutes_before=premarket_minutes_before(),
+                    ):
+                        sleep_sec = PREMARKET_RECONNECT_INTERVAL_SEC
             except Exception as exc:
                 logger.warning("CTP reconnect worker: %s", exc)
-            time.sleep(max(5, interval))
+            time.sleep(sleep_sec)
 
     threading.Thread(target=_loop, daemon=True, name="ctp-reconnect-worker").start()