test: adjust performance thresholds and add timeout to prevent hanging tests

pkg/arbitrage/multihop_test.go

@@ -415,7 +415,10 @@ func TestScanForArbitrage(t *testing.T) {
 
 	scanner := NewMultiHopScanner(log, nil, mockMarketMgr)
 
-	ctx := context.Background()
+	// Use a context with timeout to prevent the test from hanging
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
 	triggerToken := common.HexToAddress("0xA")
 	amount := big.NewInt(1000000000000000000) // 1 ETH