修复币本位平仓/到期后未自动卖回，并消除模拟盘卖币时数据库锁定。

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

lib/options/options_spot_bridge_lib.py

@@ -276,6 +276,11 @@ def rollback_bought_coin_to_usdt(
 ) -> dict[str, Any]:
     """买币后开期权失败:卖回 USDT 并关闭桥.卖光交易户可用标的币."""
     _ = coin_amount  # 兼容旧签名;定量以交易户可用为准
+    # 卖币(模拟盘)会另开连接写钱包,须先释放本连接事务锁
+    try:
+        conn.commit()
+    except Exception:
+        pass
     sell = spot_market_sell_coin_to_usdt(ex, underlying=underlying)
     if not sell.get("ok"):
         update_bridge(
@@ -313,6 +318,11 @@ def sell_residual_after_option_flat(
             if not underlying or str(b.get("underlying") or "").upper() == underlying.upper():
                 target = b
                 break
+    # 卖币(模拟盘)会另开连接写钱包,须先释放本连接事务锁,否则 database is locked
+    try:
+        conn.commit()
+    except Exception:
+        pass
     sell = spot_market_sell_coin_to_usdt(ex, underlying=underlying)
     if target is None:
         if not sell.get("ok"):