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/wallet_address_mdb.go

@@ -14,10 +14,18 @@ const (
 	NetworkPlasma   = "plasma"
 )
 
+const (
+	WalletSourceManual = "manual"
+	WalletSourceImport = "import"
+)
+
 type WalletAddress struct {
-	Network string `gorm:"column:network;uniqueIndex:wallet_address_network_address_uindex" json:"network"`
-	Address string `gorm:"column:address;uniqueIndex:wallet_address_network_address_uindex" json:"address"`
-	Status  int64  `gorm:"column:status;default:1" json:"status"`
+	Network string `gorm:"column:network;uniqueIndex:wallet_address_network_address_uindex" json:"network" example:"tron"`
+	Address string `gorm:"column:address;uniqueIndex:wallet_address_network_address_uindex" json:"address" example:"TTestTronAddress001"`
+	// 状态 1=启用 2=禁用
+	Status int64  `gorm:"column:status;default:1" json:"status" enums:"1,2" example:"1"`
+	Remark string `gorm:"column:remark;size:255" json:"remark" example:"主钱包"`
+	Source string `gorm:"column:source;size:16;default:manual" json:"source" enums:"manual,import" example:"manual"`
 	BaseModel
 }