Better energy observability

[jaywonchung]

Depends on #30 (Prometheus metric exporter integration).

Energy metrics: How much energy is being consumed? How do users measure savings?

• Grafana dashboard for cluster-wide energy usage and breakdowns to individual training jobs integrated with Zeus
  • CPU and DRAM energy measurement (#36) will help distinguish with DCGM

Experiment managers: Each training experiment can be associated with its energy consumption (aggregate & over-time).

• Weights & Biases
• MLFlow