RabbitMQ Exporter

The RabbitMQ Exporter exposes RabbitMQ metrics to Prometheus by querying
the RabbitMQ management API.

Key features:
- Exports RabbitMQ queue, exchange, and node metrics
- Supports RabbitMQ management API authentication
- Configurable scrape targets

Default ports:
- Metrics endpoint: 9419

Configuration:
- snap set rabbitmq-exporter web.listen-port=PORT
- snap set rabbitmq-exporter rabbit.url=http://127.0.0.1:15672
- snap set rabbitmq-exporter rabbit.user=guest
- snap set rabbitmq-exporter rabbit.password=guest