v1.59.0

Added

• Prometheus / Grafana metrics export. The manager can now publish your fleet's metrics on a /metrics endpoint that Prometheus (or Telegraf into InfluxDB) can scrape into a time-series database for long-term graphing in Grafana. Turn it on under Settings → Prometheus export and, optionally, protect it with a scrape token. Alongside the existing device metrics (up/down, CPU, memory, uptime, temperature, voltage, power), it now also exports per-interface traffic — receive and transmit rate for every interface — so you can build bandwidth dashboards without any extra load on your routers. A starter Grafana dashboard and a Telegraf/InfluxDB setup guide are included in the docs.