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>

docker-compose.test.yml

@@ -0,0 +1,132 @@
+version: '3.8'
+
+services:
+  # Unit tests
+  test-unit:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    container_name: mev-bot-test-unit
+    command: >
+      sh -c "
+        echo '🧪 Running Unit Tests...' &&
+        go test -v -race -short -coverprofile=coverage.out ./pkg/... ./internal/... &&
+        echo '✅ Unit tests passed!'
+      "
+    volumes:
+      - ./coverage:/app/coverage
+    environment:
+      - GO_ENV=test
+      - CGO_ENABLED=1
+
+  # Integration tests
+  test-integration:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    container_name: mev-bot-test-integration
+    command: >
+      sh -c "
+        echo '🔗 Running Integration Tests...' &&
+        go test -v -race -run Integration ./test/integration/... &&
+        echo '✅ Integration tests passed!'
+      "
+    environment:
+      - GO_ENV=test
+      - CGO_ENABLED=1
+    depends_on:
+      - test-unit
+
+  # Race condition tests
+  test-race:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    container_name: mev-bot-test-race
+    command: >
+      sh -c "
+        echo '🏁 Running Race Detector Tests...' &&
+        go test -race -v ./pkg/arbitrage/... ./pkg/scanner/... &&
+        echo '✅ No race conditions detected!'
+      "
+    environment:
+      - GO_ENV=test
+      - CGO_ENABLED=1
+
+  # Build verification
+  test-build:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    container_name: mev-bot-test-build
+    command: >
+      sh -c "
+        echo '🔨 Testing Build Process...' &&
+        go build -o /tmp/mev-bot-test ./cmd/mev-bot &&
+        echo '✅ Build successful!' &&
+        ls -lh /tmp/mev-bot-test
+      "
+    environment:
+      - GO_ENV=test
+      - CGO_ENABLED=0
+
+  # Coverage report
+  test-coverage:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    container_name: mev-bot-test-coverage
+    command: >
+      sh -c "
+        echo '📊 Generating Coverage Report...' &&
+        go test -coverprofile=coverage.out -covermode=atomic ./... &&
+        go tool cover -func=coverage.out &&
+        go tool cover -html=coverage.out -o coverage/coverage.html &&
+        echo '✅ Coverage report generated: coverage/coverage.html'
+      "
+    volumes:
+      - ./coverage:/app/coverage
+    environment:
+      - GO_ENV=test
+      - CGO_ENABLED=1
+    depends_on:
+      - test-unit
+      - test-integration
+
+  # Security scan
+  test-security:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    container_name: mev-bot-test-security
+    command: >
+      sh -c "
+        echo '🔒 Running Security Scans...' &&
+        go install github.com/securego/gosec/v2/cmd/gosec@latest &&
+        gosec -fmt=json -out=coverage/gosec-report.json ./... &&
+        gosec ./... &&
+        echo '✅ Security scan complete!'
+      "
+    volumes:
+      - ./coverage:/app/coverage
+    environment:
+      - GO_ENV=test
+
+  # Linting
+  test-lint:
+    build:
+      context: .
+      dockerfile: Dockerfile.test
+    command: >
+      sh -c "
+        echo '🧹 Running Linters...' &&
+        go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest &&
+        golangci-lint run --timeout=5m ./... &&
+        echo '✅ Linting passed!'
+      "
+    environment:
+      - GO_ENV=test
+
+networks:
+  default:
+    name: mev-bot-test-network