[M5] Default DFaaS Grafana Dashboard

[miciav]

Description

Pre-built dashboard for dfaas workload visualization.

Files to create

• lb_plugins/plugins/dfaas/grafana/dfaas-dashboard.json (new)

Dashboard panels

• Node CPU/RAM/Power over time
• Per-function latency heatmap
• Request success rate
• Throughput by function
• Overload events timeline
• Scaphandre power metrics (quando disponibile)

Acceptance criteria

• Dashboard loads correctly
• Variables for run_id, host selection
• Prometheus queries match existing queries.yml

Milestone: M5 - Grafana Integration (dfaas)
Issue: 5.3

[miciav]

Default DFaaS Grafana dashboard in lb_plugins/plugins/dfaas/grafana/dfaas-dashboard.json.