feat(api): standardize timestamp field across log structures

internal/logic/public/order/closeOrderLogic.go

@@ -102,7 +102,7 @@ func (l *CloseOrderLogic) CloseOrder(req *types.CloseOrderRequest) error {
 				Amount:      orderInfo.GiftAmount,
 				Balance:     deduction,
 				Remark:      "Order cancellation refund",
-				CreatedAt:   time.Now().UnixMilli(),
+				Timestamp:   time.Now().UnixMilli(),
 			}
 			content, _ := giftLog.Marshal()
 

internal/logic/public/order/purchaseLogic.go

@@ -204,7 +204,7 @@ func (l *PurchaseLogic) Purchase(req *types.PurchaseOrderRequest) (resp *types.P
 				Amount:      orderInfo.GiftAmount,
 				Balance:     u.GiftAmount,
 				Remark:      "Purchase order deduction",
-				CreatedAt:   time.Now().UnixMilli(),
+				Timestamp:   time.Now().UnixMilli(),
 			}
 			content, _ := giftLog.Marshal()
 

internal/logic/public/order/renewalLogic.go

@@ -171,7 +171,7 @@ func (l *RenewalLogic) Renewal(req *types.RenewalOrderRequest) (resp *types.Rene
 				Amount:      orderInfo.GiftAmount,
 				Balance:     u.GiftAmount,
 				Remark:      "Renewal order deduction",
-				CreatedAt:   time.Now().UnixMilli(),
+				Timestamp:   time.Now().UnixMilli(),
 			}
 			content, _ := giftLog.Marshal()
 

internal/logic/public/order/resetTrafficLogic.go

@@ -112,7 +112,7 @@ func (l *ResetTrafficLogic) ResetTraffic(req *types.ResetTrafficOrderRequest) (r
 				Amount:      orderInfo.GiftAmount,
 				Balance:     u.GiftAmount,
 				Remark:      "Renewal order deduction",
-				CreatedAt:   time.Now().UnixMilli(),
+				Timestamp:   time.Now().UnixMilli(),
 			}
 			content, _ := giftLog.Marshal()