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_premarket_connect.py

@@ -3,7 +3,7 @@
 # 严禁用于：带单/代客理财、向他人推荐期货品种或买卖建议、融资配资等业务。
 # 详见 LICENSE.zh-CN.txt 与 docs/软件购买与使用协议.md
 
-"""CTP 按计划自动连接/断开：盘前 30 分钟连，日盘/夜盘收盘后 30 分钟断。"""
+"""CTP 按计划自动连接：盘前 30 分钟检查；交易时段断线后台重连；不自动强制断开。"""
 from __future__ import annotations
 
 import logging
@@ -18,11 +18,13 @@ from market_sessions import (
     is_trading_session,
     should_keep_ctp_connected,
 )
-from vnpy_bridge import ctp_disconnect, ctp_start_connect, ctp_status
+from vnpy_bridge import ctp_start_connect, ctp_status
 
 logger = logging.getLogger(__name__)
 
 CHECK_INTERVAL_SEC = 60
+TRADING_CHECK_INTERVAL_SEC = 15
+PREMARKET_CHECK_INTERVAL_SEC = 30
 DEFAULT_MINUTES_BEFORE = 30
 DEFAULT_MINUTES_AFTER = 30
 
@@ -49,14 +51,6 @@ def _scheduled_connect_enabled() -> bool:
     )
 
 
-def _scheduled_disconnect_enabled() -> bool:
-    return (os.getenv("CTP_POSTMARKET_DISCONNECT", "true") or "true").strip().lower() in (
-        "1",
-        "true",
-        "yes",
-    )
-
-
 def should_auto_connect_now(*, minutes_before: int | None = None) -> bool:
     """是否应保持/发起 CTP 连接（供重连、权限判断复用）。"""
     mins_b = premarket_minutes_before() if minutes_before is None else minutes_before
@@ -76,7 +70,7 @@ def start_ctp_premarket_connect_worker(
     get_setting_fn: Callable[[str, str], str] | None = None,
     interval: int = CHECK_INTERVAL_SEC,
 ) -> None:
-    """盘前自动连接；日盘/夜盘收盘宽限结束后自动断开。"""
+    """盘前 30 分钟：未连接则自动连；已连接则不重复发起。不自动强制断开。"""
 
     def _loop() -> None:
         time.sleep(10)
@@ -101,7 +95,7 @@ def start_ctp_premarket_connect_worker(
                                 logger.info("交易时段内自动连接 CTP [%s]", mode)
                             elif in_postmarket_grace_window(minutes_after=mins_a):
                                 logger.info(
-                                    "盘后宽限期内保持/恢复 CTP 连接 [%s]（收盘后 %d 分钟内）",
+                                    "盘后宽限期内恢复 CTP 连接 [%s]（收盘后 %d 分钟内）",
                                     mode,
                                     mins_a,
                                 )
@@ -111,17 +105,10 @@ def start_ctp_premarket_connect_worker(
                                     mode,
                                     mins_b,
                                 )
-                    if not is_trading_session() and in_premarket_connect_window(
-                        minutes_before=mins_b,
-                    ):
-                        sleep_sec = 30
-                elif _scheduled_disconnect_enabled() and st.get("connected"):
-                    ctp_disconnect()
-                    logger.info(
-                        "盘后自动断开 CTP [%s]（日盘/夜盘结束 %d 分钟后）",
-                        mode,
-                        mins_a,
-                    )
+                    if is_trading_session():
+                        sleep_sec = TRADING_CHECK_INTERVAL_SEC
+                    elif in_premarket_connect_window(minutes_before=mins_b):
+                        sleep_sec = PREMARKET_CHECK_INTERVAL_SEC
             except Exception as exc:
                 logger.warning("CTP scheduled connect worker: %s", exc)
             time.sleep(sleep_sec)