feat: add admin panel with multi-chain support and notification system

- Add full admin REST API: auth, API keys, chains, chain tokens, wallets,
  orders, RPC nodes, settings, dashboard stats, notifications
- Add JWT-based admin authentication and API key auth middleware
- Add multi-chain listeners: BSC, ETH, Polygon, Plasma, EVM WebSocket
- Add RPC node health check job with automatic failover
- Add Telegram notification channel for order events
- Add installer for first-run database initialization
- Add new DB models: admin_user, api_key, chain, chain_token,
  rpc_node, settings, notification_channel
- Add order statistics aggregation (daily/monthly/by-chain)
- Serve built admin SPA from embedded www/ assets
- Add comprehensive test coverage for all new features

src/model/mdb/orders_mdb.go

@@ -13,24 +13,30 @@ const (
 )
 
 type Orders struct {
-	TradeId            string  `gorm:"column:trade_id;uniqueIndex:orders_trade_id_uindex" json:"trade_id"`
-	OrderId            string  `gorm:"column:order_id;uniqueIndex:orders_order_id_uindex" json:"order_id"` // the order id is generated by client, and will notify client when order is paid
+	TradeId            string  `gorm:"column:trade_id;uniqueIndex:orders_trade_id_uindex" json:"trade_id" example:"T2026041612345678"`
+	OrderId            string  `gorm:"column:order_id;uniqueIndex:orders_order_id_uindex" json:"order_id" example:"ORD20260416001"`
 	ParentTradeId      string  `gorm:"column:parent_trade_id;index:idx_orders_parent_trade_id;default:''" json:"parent_trade_id"`
-	BlockTransactionId string  `gorm:"index:orders_block_transaction_id_index;column:block_transaction_id" json:"block_transaction_id"`
-	Amount             float64 `gorm:"column:amount" json:"amount"`
-	Currency           string  `gorm:"column:currency" json:"currency"`
-	ActualAmount       float64 `gorm:"column:actual_amount" json:"actual_amount"`
-	ReceiveAddress     string  `gorm:"column:receive_address" json:"receive_address"`
-	Token              string  `gorm:"column:token" json:"token"`
-	Network            string  `gorm:"column:network" json:"network"`
-	Status             int     `gorm:"column:status;default:1" json:"status"`
-	NotifyUrl          string  `gorm:"column:notify_url" json:"notify_url"`
-	RedirectUrl        string  `gorm:"column:redirect_url" json:"redirect_url"`
-	Name               string  `gorm:"column:name" json:"name"`
-	CallbackNum        int     `gorm:"column:callback_num;default:0" json:"callback_num"`
-	CallBackConfirm    int     `gorm:"column:callback_confirm;default:2" json:"callback_confirm"`
-	IsSelected         bool    `gorm:"column:is_selected;default:false" json:"is_selected"`
-	PaymentType        string  `gorm:"column:payment_type" json:"payment_type"`
+	BlockTransactionId string  `gorm:"index:orders_block_transaction_id_index;column:block_transaction_id" json:"block_transaction_id" example:"0xabc123..."`
+	Amount             float64 `gorm:"column:amount" json:"amount" example:"100.0000"`
+	Currency           string  `gorm:"column:currency" json:"currency" example:"CNY"`
+	ActualAmount       float64 `gorm:"column:actual_amount" json:"actual_amount" example:"14.2857"`
+	ReceiveAddress     string  `gorm:"column:receive_address" json:"receive_address" example:"TTestTronAddress001"`
+	Token              string  `gorm:"column:token" json:"token" example:"USDT"`
+	Network            string  `gorm:"column:network" json:"network" example:"tron"`
+	// 订单状态 1=等待支付 2=支付成功 3=已过期
+	Status      int    `gorm:"column:status;default:1" json:"status" enums:"1,2,3" example:"1"`
+	NotifyUrl   string `gorm:"column:notify_url" json:"notify_url" example:"https://example.com/notify"`
+	RedirectUrl string `gorm:"column:redirect_url" json:"redirect_url" example:"https://example.com/success"`
+	Name        string `gorm:"column:name" json:"name" example:"VIP月卡"`
+	CallbackNum int    `gorm:"column:callback_num;default:0" json:"callback_num" example:"0"`
+	// 回调确认状态 1=回调成功 2=未回调/回调失败
+	CallBackConfirm int    `gorm:"column:callback_confirm;default:2" json:"callback_confirm" enums:"1,2" example:"2"`
+	IsSelected      bool   `gorm:"column:is_selected;default:false" json:"is_selected" example:"false"`
+	PaymentType     string `gorm:"column:payment_type" json:"payment_type" example:"Epay"`
+	ApiKeyID        uint64 `gorm:"column:api_key_id;default:0;index:orders_api_key_id_index" json:"api_key_id" example:"1"`
+	// PayBySubId holds the primary-key ID of the sub-order that settled this parent order.
+	// Zero when the parent order was paid directly (no sub-order involved).
+	PayBySubId uint64 `gorm:"column:pay_by_sub_id;default:0" json:"pay_by_sub_id" example:"0"`
 	BaseModel
 }