P11.5 + B2.1/B2.2: per-command units + description (where applicable)

Adds  to scalar setters whose payloads are
plain numbers OR {value, unit}. Skipped where payload is compound or
mode-dependent (control-%, {F, C: [...]}, etc.) — documented inline.
Every command gains a description field for wikiGen consumption.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/commands/index.js

@@ -12,6 +12,7 @@ module.exports = [
     topic: 'set.mode',
     aliases: ['changemode'],
     payloadSchema: { type: 'string' },
+    description: 'Switch the station between auto / manual control modes.',
     handler: handlers.setMode,
   },
   {
@@ -19,6 +20,7 @@ module.exports = [
     aliases: ['registerChild'],
     // payload is the Node-RED id (string) of the child node.
     payloadSchema: { type: 'string' },
+    description: 'Register a child node (machine group, measurement, …) with this station.',
     handler: handlers.registerChild,
   },
   {
@@ -26,12 +28,16 @@ module.exports = [
     aliases: ['calibratePredictedVolume'],
     // any: payload may be a number or numeric string.
     payloadSchema: { type: 'any' },
+    units: { measure: 'volume', default: 'm3' },
+    description: 'Calibrate the predicted-volume integrator to a known basin volume.',
     handler: handlers.calibrateVolume,
   },
   {
     topic: 'cmd.calibrate.level',
     aliases: ['calibratePredictedLevel'],
     payloadSchema: { type: 'any' },
+    units: { measure: 'length', default: 'm' },
+    description: 'Calibrate the predicted-volume integrator to a known basin level.',
     handler: handlers.calibrateLevel,
   },
   {
@@ -39,18 +45,24 @@ module.exports = [
     aliases: ['q_in'],
     // any: number, numeric string, or { value, unit, timestamp } object.
     payloadSchema: { type: 'any' },
+    units: { measure: 'volumeFlowRate', default: 'm3/h' },
+    description: 'Push a measured inflow value into the basin balance.',
     handler: handlers.setInflow,
   },
   {
     topic: 'set.outflow',
     aliases: ['q_out'],
     payloadSchema: { type: 'any' },
+    units: { measure: 'volumeFlowRate', default: 'm3/h' },
+    description: 'Push a measured outflow value into the basin balance.',
     handler: handlers.setOutflow,
   },
   {
     topic: 'set.demand',
     aliases: ['Qd'],
     payloadSchema: { type: 'any' },
+    units: { measure: 'volumeFlowRate', default: 'm3/h' },
+    description: 'Operator outflow demand setpoint for the station.',
     handler: handlers.setDemand,
   },
 ];