feat: verify manual mark-paid payments

- add on-chain validation before manual mark-paid
- verify recipient address, token contract, amount, confirmations, and tx time
- reject duplicate transaction hashes and non on-chain orders
- add manual payment verification tests for EVM, TRON, and Solana
- change BSC network key to binance
- add display_name to supported_assets while keeping network unchanged

src/model/mdb/wallet_address_mdb.go

@@ -9,7 +9,7 @@ const (
 	NetworkTron     = "tron"
 	NetworkSolana   = "solana"
 	NetworkEthereum = "ethereum"
-	NetworkBsc      = "bsc"
+	NetworkBsc      = "binance"
 	NetworkPolygon  = "polygon"
 	NetworkPlasma   = "plasma"
 )