v1.58.0

Added

• Threshold alerts for device metrics. The manager already keeps a per-device history of CPU load, memory usage and temperature. It can now watch those values and send a webhook when one crosses a limit you set, and an optional second webhook when it recovers. Thresholds live under Settings → Metric alerts: CPU and memory start at 90%, temperature starts off (normal temperature differs too much between models to pick a safe default). An alert only fires after the value stays over the limit for a few readings in a row, so brief spikes don't page you. You can override any threshold on an individual device, or set it to 0 there to silence that one metric. Follows the same webhook approach as the existing alerts, so it works with ntfy, Discord, or any custom endpoint.