Monitor the task system

TODO: This tutorial will walk through monitoring a running DiracX task system, including:

• Checking the status of task streams (queue lengths, consumer lag)
• Viewing currently running tasks
• Checking when periodic tasks last ran and when they are next scheduled
• Inspecting the dead-letter queue for failed tasks
• Understanding the metrics exposed via OpenTelemetry

A dedicated monitoring dashboard is planned. In the interim, see the operate how-to guide for basic Redis CLI commands to inspect system state.