fix: revert Number() removal - TronWeb TypeScript requires number type

CodeRabbit was incorrect about sendTrx accepting strings.
TronWeb's TypeScript definition requires number for amount parameter:
  sendTrx(to: string, amount?: number, from?: string)

While implementation accepts strings internally, the type definition
enforces number, causing TS2345 error.

Kept the important fix: using args.from instead of vault for sender.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: gomesalexandre

packages/swapper/src/thorchain-utils/tron/getTronTransactionFees.ts

@@ -67,7 +67,7 @@ export const getTronTransactionFees = async (
 
       let tx = await tronWeb.transactionBuilder.sendTrx(
         vault,
-        sellAmountIncludingProtocolFeesCryptoBaseUnit,
+        Number(sellAmountIncludingProtocolFeesCryptoBaseUnit),
         from,
       )