Per-asset diagram_config (JSONB) maps live MQTT field_keys to brine/resin
tank roles, editable on the Assets page with dropdowns populated from that
asset's actual telemetry. Dashboard renders brine + 1-2 resin tanks with
color-coded fill levels, an "in service" tank indicator, and an animated
flow/regen indicator when regeneration is active.
Read-only monitoring/alerting for boilers, water softener, calorifiers
and pumps via a generic MQTT-topic-prefix asset model, so new
equipment can be onboarded without new ingestion code. Threshold and
stale-data alert rules with email + in-app notification.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
