feat(distribution): 通道费改主站承担，并按冷却期自动释放结算

利润不再扣支付通道费；站点可配置结算冷却期，到期自动入账，已释放后退款从收款站钱包回冲。同时修复当日自动批次无法追加、三方回冲打错钱包，以及测试库自增重置被 MySQL 统计缓存跳过的问题。

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

backend/internal/modules/dispute/arbitration.go

@@ -11,6 +11,7 @@ import (
 	"hfb_sys/backend/internal/logging"
 	"hfb_sys/backend/internal/model"
 	"hfb_sys/backend/internal/modules/adminnotification"
+	"hfb_sys/backend/internal/modules/distribution"
 	"hfb_sys/backend/internal/modules/notification"
 	ordermodule "hfb_sys/backend/internal/modules/order"
 	"hfb_sys/backend/internal/modules/rentergrowth"
@@ -130,6 +131,11 @@ func (r *Repository) Arbitrate(ctx context.Context, adminID uint64, id uint64, r
 		if err := tx.Save(&order).Error; err != nil {
 			return err
 		}
+		if order.Status == "completed" {
+			if err := distribution.EnsureCompletedReleaseAtTx(tx, order.ID); err != nil {
+				return err
+			}
+		}
 		if err := tx.Save(&listing).Error; err != nil {
 			return err
 		}