feat(gateway): add API improvements and Docker deployment support

[fengtality]

Summary

This PR adds several significant improvements to the Gateway server:

Gateway API Enhancements

• ✅ Add /chains/{chain}/transactions endpoint for fetching wallet transaction history
• ✅ Add /chains/{chain}/parse endpoint for parsing transaction details
• ✅ Add /chains/{chain}/wrap and /chains/{chain}/unwrap endpoints for native token wrapping
• ✅ Improve Etherscan and Helius service integrations
• ✅ Add transaction parsing with decoded method names and parameters
• ✅ Add configurable baseFeeMultiplier for EVM chains

Docker & Deployment

• ✅ Add Docker Compose configurations (dev, prod, mobile)
• ✅ Add comprehensive DOCKER.md and MOBILE_DEPLOYMENT.md guides
• ✅ Add mobile deployment script with ngrok tunnel support
• ✅ Add .env.example template for easy setup
• ✅ Update docker-compose.yml with gateway-app frontend service

Configuration

• ✅ Add API key authentication support (GATEWAY_API_KEYS)
• ✅ Add Etherscan API key support for transaction fetching
• ✅ Add server configuration for CORS and API keys
• ✅ Improve RPC provider configuration

Bug Fixes

• ✅ Fix Meteora and PancakeSwap position ownership queries
• ✅ Improve error handling in swap quote service
• ✅ Fix CORS configuration for web deployments

Documentation

• ✅ Add comprehensive app documentation in app-docs/
• ✅ Document Docker deployment options
• ✅ Add mobile deployment guide
• ✅ Update README with new features

Testing

• ✅ All existing tests pass
• ✅ New tests added for transaction and parse endpoints
• ✅ Manual testing of Docker deployments
• ✅ Mobile deployment tested with ngrok

Breaking Changes

None - all changes are backwards compatible.

Related Issues

Related to Gateway App development (now separated into hummingbot/gateway-app repo).

---

🤖 Generated with Claude Code