Assist with the design and implementation of the Grafana stack (Grafana, Loki, Tempo, Mimir/Prometheus, Alloy) for metrics, logs, and traces, including architecture, sizing, high availability, and retention strategy. The ideal candidate has deep, hands-on experience designing, deploying, and operating the Grafana stack (Grafana, Loki, Tempo, Mimir/Prometheus, Alloy) in enterprise environments.