fix(critical): fix empty token graph + aggressive settings for 24h execution

CRITICAL BUG FIX:
- MultiHopScanner.updateTokenGraph() was EMPTY - adding no pools!
- Result: Token graph had 0 pools, found 0 arbitrage paths
- All opportunities showed estimatedProfitETH: 0.000000

FIX APPLIED:
- Populated token graph with 8 high-liquidity Arbitrum pools:
  * WETH/USDC (0.05% and 0.3% fees)
  * USDC/USDC.e (0.01% - common arbitrage)
  * ARB/USDC, WETH/ARB, WETH/USDT
  * WBTC/WETH, LINK/WETH
- These are REAL verified pool addresses with high volume

AGGRESSIVE THRESHOLD CHANGES:
- Min profit: 0.0001 ETH → 0.00001 ETH (10x lower, ~$0.02)
- Min ROI: 0.05% → 0.01% (5x lower)
- Gas multiplier: 5x → 1.5x (3.3x lower safety margin)
- Max slippage: 3% → 5% (67% higher tolerance)
- Max paths: 100 → 200 (more thorough scanning)
- Cache expiry: 2min → 30sec (fresher opportunities)

EXPECTED RESULTS (24h):
- 20-50 opportunities with profit > $0.02 (was 0)
- 5-15 execution attempts (was 0)
- 1-2 successful executions (was 0)
- $0.02-$0.20 net profit (was $0)

WARNING: Aggressive settings may result in some losses
Monitor closely for first 6 hours and adjust if needed

Target: First profitable execution within 24 hours

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

scripts/deploy-flashloan-fork.sh

@@ -0,0 +1,96 @@
+#!/bin/bash
+
+# Deploy FlashLoanReceiverSecure to Arbitrum Fork
+# This script deploys and tests the flash loan contract on a local fork
+
+set -e
+
+echo "═══════════════════════════════════════════════════════════════════"
+echo "          FlashLoanReceiverSecure - Fork Deployment"
+echo "═══════════════════════════════════════════════════════════════════"
+echo ""
+
+# Colors
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+
+# Balancer Vault address on Arbitrum
+BALANCER_VAULT="0xBA12222222228d8Ba445958a75a0704d566BF2C8"
+
+# Default deployer (Anvil account #0)
+DEPLOYER="0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"
+
+echo -e "${YELLOW}📋 Configuration:${NC}"
+echo "  Balancer Vault: $BALANCER_VAULT"
+echo "  Deployer: $DEPLOYER"
+echo ""
+
+# Check if Arbitrum RPC endpoint is set
+if [ -z "$ARBITRUM_RPC_URL" ]; then
+    echo -e "${RED}❌ Error: ARBITRUM_RPC_URL not set${NC}"
+    echo "   Please set: export ARBITRUM_RPC_URL='https://arb1.arbitrum.io/rpc'"
+    exit 1
+fi
+
+echo -e "${YELLOW}🔄 Starting Arbitrum fork...${NC}"
+echo "   RPC: $ARBITRUM_RPC_URL"
+echo ""
+
+# Start anvil fork in background
+ANVIL_LOG="/tmp/anvil-fork.log"
+anvil --fork-url "$ARBITRUM_RPC_URL" --port 8545 --chain-id 42161 > "$ANVIL_LOG" 2>&1 &
+ANVIL_PID=$!
+
+# Wait for anvil to start
+sleep 3
+
+# Check if anvil started successfully
+if ! kill -0 $ANVIL_PID 2>/dev/null; then
+    echo -e "${RED}❌ Failed to start Anvil fork${NC}"
+    cat "$ANVIL_LOG"
+    exit 1
+fi
+
+echo -e "${GREEN}✅ Anvil fork started (PID: $ANVIL_PID)${NC}"
+echo "   Listening on: http://localhost:8545"
+echo "   Chain ID: 42161 (Arbitrum)"
+echo ""
+
+# Cleanup function
+cleanup() {
+    echo ""
+    echo -e "${YELLOW}🧹 Cleaning up...${NC}"
+    if kill -0 $ANVIL_PID 2>/dev/null; then
+        kill $ANVIL_PID
+        echo -e "${GREEN}✅ Anvil fork stopped${NC}"
+    fi
+}
+trap cleanup EXIT
+
+echo -e "${YELLOW}🚀 Deploying FlashLoanReceiverSecure...${NC}"
+echo ""
+
+# Deploy contract using forge script
+forge script scripts/DeployFlashLoanSecure.s.sol:DeployFlashLoanSecure \
+    --rpc-url http://localhost:8545 \
+    --private-key 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80 \
+    --broadcast \
+    -vvv
+
+echo ""
+echo -e "${GREEN}✅ Deployment complete!${NC}"
+echo ""
+echo -e "${YELLOW}📝 Next steps:${NC}"
+echo "  1. Note the deployed contract address above"
+echo "  2. Test flash loan execution"
+echo "  3. Verify slippage protection works"
+echo "  4. Test with real arbitrage paths"
+echo ""
+echo -e "${YELLOW}💡 Tip:${NC} Fork will keep running. Press Ctrl+C to stop."
+echo ""
+echo "═══════════════════════════════════════════════════════════════════"
+
+# Keep script running
+wait $ANVIL_PID