Fix server hang: stop CTP reconnect storm and throttle live account polling.

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

modules/ctp/vnpy_bridge.py

@@ -2904,27 +2904,27 @@ def ctp_start_connect(mode: str, *, force: bool = False, scheduled: bool = False
 
 
 def ctp_session_needs_reconnect(mode: str) -> bool:
-    """连接看似在线但不可交易、无资金回报或会话过旧时需强制重连。"""
+    """连接看似在线但不可交易或会话过旧时需强制重连（连接进行中不重复发起）。"""
     if _use_ctp_worker_client():
         st = ctp_ipc_client.status(mode)
+        if st.get("connecting"):
+            return False
         if not st.get("connected"):
             return True
         if not st.get("td_logged_in"):
             return True
         return False
     b = get_bridge()
+    if b.connect_in_progress():
+        return False
     if b.connected_mode != mode:
         return True
+    since_connect = time.time() - float(getattr(b, "_last_connect_ok_ts", 0) or 0)
+    if since_connect < 120:
+        return False
     if not b._td_logged_in():
         return True
-    age = time.time() - float(getattr(b, "_last_connect_ok_ts", 0) or 0)
-    if age > 3 * 3600:
-        return True
-    try:
-        acc = b.get_account()
-        if float(acc.get("balance") or 0) <= 0:
-            return True
-    except Exception:
+    if since_connect > 3 * 3600:
         return True
     return False