fix: ctp_list_positions pass refresh_margin to fix empty positions

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

vnpy_bridge.py

@@ -1027,11 +1027,16 @@ def ctp_get_account(mode: str) -> dict[str, Any]:
     return b.get_account()
 
 
-def ctp_list_positions(mode: str, *, refresh_if_empty: bool = True) -> list[dict[str, Any]]:
+def ctp_list_positions(
+    mode: str,
+    *,
+    refresh_if_empty: bool = True,
+    refresh_margin: bool = False,
+) -> list[dict[str, Any]]:
     b = get_bridge()
     if b.connected_mode != mode or not b.ping():
         return []
-    return b.list_positions(refresh_if_empty=refresh_if_empty)
+    return b.list_positions(refresh_if_empty=refresh_if_empty, refresh_margin=refresh_margin)
 
 
 def ctp_list_active_orders(mode: str) -> list[dict[str, Any]]: