Add comprehensive server and MCP infrastructure documentation

Documents all server implementations and external service requirements
discovered in the repository.

Server Inventory:
1. Regulatory MCP Server (TypeScript) - Model Context Protocol for FDA/NHTSA/FAA
2. Node.js API Gateway (Express + Socket.io) - Authentication, MongoDB, InfluxDB, OpenSim
3. Infrastructure API (Production Express) - PostgreSQL, Redis, MQTT, Prometheus
4. Node-RED Dashboard - Real-time HBCM monitoring and control

Key Features Documented:
- Complete API endpoint listings for all servers
- External service dependencies (MongoDB, PostgreSQL, Redis, InfluxDB, MQTT)
- Docker deployment configurations
- Security checklist and production requirements
- Performance benchmarks and resource requirements
- Troubleshooting guides
- Quick start commands for each service

Service Status:
- MCP Server: Ready (needs FDA API key)
- Node.js Gateway: Ready (needs MongoDB, InfluxDB, FastAPI)
- Infrastructure API: Ready (needs PostgreSQL, Redis, MQTT)
- Node-RED: Ready (needs FastAPI WebSocket)

Total Ports: 9 (1880, 3000, 5432, 6379, 8000, 8080, 8086, 27017, 1883)
Production Ready: Yes (with external services)
Development Ready: Yes (core functionality standalone)

This completes the comprehensive repository execution with full documentation
of all runnable components including servers and infrastructure.

Author: claude