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-keystore.sh

@@ -1,8 +1,8 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # MEV Bot Keystore Setup Script
 # Encrypts and stores the private key securely
 
-set -e
+set -euo pipefail
 
 KEYSTORE_DIR="keystore/production"
 PRIVATE_KEY_FILE="/tmp/wallet_key.txt"
@@ -21,7 +21,8 @@ if [ ! -f "$PRIVATE_KEY_FILE" ]; then
 fi
 
 # Check if encryption key is set
-if [ -z "${!ENCRYPTION_KEY_ENV}" ]; then
+ENCRYPTION_KEY="${MEV_BOT_ENCRYPTION_KEY:-}"
+if [ -z "$ENCRYPTION_KEY" ]; then
     echo "⚠️  Warning: $ENCRYPTION_KEY_ENV not set in environment"
     echo ""
     echo "📝 Setting up encryption key..."