Grafana Stat/Gauge panels default the Fields option to "Numeric Fields"
(reduceOptions.fields == ""), so string-valued fields (mode, state,
movementState, direction, flowSource, predictionQuality, running) are excluded
and the panel renders "No data" even though the Flux query (last()) returns the
string correctly.
Set reduceOptions.fields = "/.*/" ("All fields") on every stat panel bound to a
string field across machine, machineGroup, pumpingStation, valve,
valveGroupControl, and monster templates. lastNotNull calc was already correct.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
