Audit fixes: LIVE symbols/fills/expiry/pending, security harden, add 更新说明.

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

backend/app/live/binance_trade.py

@@ -219,12 +219,17 @@ class BinanceTradeClient:
                 sz = safe_float(q.get("executedQty")) or safe_float(q.get("quantity"))
                 st = str(q.get("status") or "").upper()
                 data = q
-                if avg and avg > 0 and st in ("FILLED", "PARTIALLY_FILLED"):
+                if avg and avg > 0 and st == "FILLED":
                     break
                 if st in ("CANCELED", "REJECTED", "EXPIRED"):
                     raise RuntimeError(f"币安期权订单失败 status={st} {q}")
+                if st == "PARTIALLY_FILLED":
+                    continue
         if not avg or avg <= 0:
             raise RuntimeError(f"币安期权无成交均价: {data}")
+        st_final = str(data.get("status") or "").upper()
+        if st_final and st_final != "FILLED":
+            raise RuntimeError(f"币安期权未完全成交 status={st_final} {data}")
         from .money import abs_fee_usdt
 
         fee = abs(safe_float(data.get("fee")) or 0.0)