Document new RabbitMQ configuration options

[allipry]

Problem

PR #1 introduced new RabbitMQ configuration options that are not documented:

• OTS_RABBITMQ_USERNAME - RabbitMQ username (default: guest)
• OTS_RABBITMQ_PASSWORD - RabbitMQ password (default: guest)
• OTS_RABBITMQ_PORT - RabbitMQ port (default: 5672)
• OTS_RABBITMQ_VHOST - RabbitMQ virtual host (default: /)

These options are critical for production deployments with secured RabbitMQ.

Tasks

• Add new options to DefaultConfig class with proper defaults
• Update README.md with configuration documentation
• Add example to .env.template file
• Document in deployment guides

Example Documentation

### RabbitMQ Configuration

| Variable | Default | Description |
|----------|---------|-------------|
| OTS_RABBITMQ_SERVER_ADDRESS | localhost | RabbitMQ server hostname |
| OTS_RABBITMQ_PORT | 5672 | RabbitMQ AMQP port |
| OTS_RABBITMQ_USERNAME | guest | RabbitMQ username |
| OTS_RABBITMQ_PASSWORD | guest | RabbitMQ password |
| OTS_RABBITMQ_VHOST | / | RabbitMQ virtual host |

Related

Identified during code review of PR #1