feat(prod): complete production deployment with Podman containerization

- Migrate from Docker to Podman for enhanced security (rootless containers)
- Add production-ready Dockerfile with multi-stage builds
- Configure production environment with Arbitrum mainnet RPC endpoints
- Add comprehensive test coverage for core modules (exchanges, execution, profitability)
- Implement production audit and deployment documentation
- Update deployment scripts for production environment
- Add container runtime and health monitoring scripts
- Document RPC limitations and remediation strategies
- Implement token metadata caching and pool validation

This commit prepares the MEV bot for production deployment on Arbitrum
with full containerization, security hardening, and operational tooling.

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

scripts/setup-env.sh

@@ -1,10 +1,16 @@
-#!/bin/bash
+#!/usr/bin/env bash
+set -euo pipefail
 
 # Setup script for MEV Bot environment
 echo "Setting up MEV Bot environment..."
 
-# Copy the fixed .env file
-cp .env.fixed .env
+# Copy the fixed .env file if it exists
+if [[ -f ".env.fixed" ]]; then
+    cp .env.fixed .env
+    echo "✅ Copied .env.fixed to .env"
+else
+    echo "⚠️  Warning: .env.fixed not found, skipping copy"
+fi
 
 # Create required directories
 mkdir -p keystore backups logs