New Pi package (repo copy canbus/ha/dsi_fault_alert.yaml): when the CAN
node's DSI-lockout binary sensor holds 'on' for 10s, fire the server-
alerts Discord webhook (@here, appropriately rude), with a cleared
message when it recovers. Webhook URL lives in the Pi's HA secrets.yaml
(!secret discord_server_alerts_webhook), not the repo.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
