Add Kepler power monitoring for TNF clusters

[lucaconsalvi]

Summary

• Add Kepler v0.11.3 deployment automation (Ansible role + playbook + shell scripts) for power
  monitoring on TNF clusters
• Include Grafana with a pre-configured TNF Power Monitoring dashboard for visualization
• Add a Claude Code skill (/tnf-power) that queries Kepler metrics via Prometheus and generates
  a power consumption report
• Add documentation covering Kepler architecture, usage, and a presentation guide

Details

Deployment

• kepler.yml playbook with kepler Ansible role handling namespace, RBAC, DaemonSet,
  ServiceMonitor, and user workload monitoring setup
• Grafana deployment with a custom dashboard (per-node power, control plane breakdown, top
  containers)
• make deploy-kepler / make remove-kepler targets and corresponding shell scripts
• Supports both install and removal via -e kepler_state=absent

Claude Code Skill

• /tnf-power skill queries Prometheus for node and container CPU power metrics
• Detects RAPL (bare metal) vs estimated (VM) measurement mode
• Reports cluster total, per-node breakdown, control plane overhead, and top containers

Documentation

• docs/kepler/README.md — Setup and usage guide
• docs/kepler/KEPLER-ARCHITECTURE.md — How Kepler works on TNF clusters
• docs/kepler/KEPLER-PRESENTATION.md — Demo/presentation walkthrough

Test plan

• Deploy Kepler on a TNF cluster via make deploy-kepler
• Verify Kepler exporter pods are running on both nodes
• Confirm metrics are scraped in Prometheus (2 active targets)
• Run /tnf-power skill and verify report output
• Access Grafana dashboard and confirm panels render
• Remove Kepler via make remove-kepler and verify cleanup

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This pull-request has been approved by: lucaconsalvi
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