P5 wave 2: convert rotatingMachine to BaseDomain + extract helper modules

specificClass.js: 1760 → 400 lines.
  Machine extends BaseDomain. configure() wires curves + predictors +
  drift + pressure + state bindings + measurement handlers + flow
  controller. ChildRouter handles pressure/flow/power/temperature
  measurement events; custom registerChild override preserves the
  dedup + virtual-vs-real pressure tracking the integration tests
  pin.

  Added small host-aware helper modules to fit the 400-line cap:
    src/prediction/predictionMath.js   (calcFlow/Power/Ctrl)
    src/prediction/efficiencyMath.js   (calcCog/EfficiencyCurve/etc.)
    src/pressure/pressureSelector.js   (getMeasuredPressure source preference)
    src/state/sequenceController.js    (executeSequence/setpoint/wait helpers)
    src/measurement/childRegistrar.js  (custom registerChild path)
    src/drift/healthRefresh.js         (drift status update wrappers)
    src/io/output.js                   (buildOutput + buildStatusBadge)

  unitPolicy: live UnitPolicy methods .canonical()/.output()/.curve()
  bridged to legacy property-path readers via a frozen view object —
  same pattern as MGC. See OPEN_QUESTIONS.md.

nodeClass.js: 433 → 61 lines.
  Extends BaseNodeAdapter. tickInterval=null (event-driven on state +
  measurement events). buildDomainConfig stamps the rotatingMachine
  state + errorMetrics slices on the domain config so configure()
  builds them from there.

5 tests adjusted (4 nodeClass-config, 1 error-paths) — pre-refactor
they pinned private methods (_loadConfig, _setupSpecificClass,
_attachInputHandler, _updateNodeStatus) that no longer exist. New
versions drive the public BaseNodeAdapter surface or call extracted
io/state-machine helpers directly. See OPEN_QUESTIONS.md 2026-05-10
"private nodeClass tests" for the deferred rewrite plan.

196 / 196 tests pass (basic 110 + integration ~80 + edge ~6).

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

src/measurement/measurementHandlers.js

@@ -129,6 +129,53 @@ class MeasurementHandlers {
     host._updateMetricDrift('power', measuredCanonical, context);
     host._updatePredictionHealth();
   }
+
+  /** Reconcile a measured-flow reading with the existing up/downstream slots. */
+  handleMeasuredFlow() {
+    const host = this.host;
+    const diff = host.measurements.type('flow').variant('measured').difference();
+    if (diff != null) {
+      if (diff.value < 0.001) { this.logger.debug(`Flow match: ${diff.value}`); return diff.value; }
+      this.logger.error('Something wrong with down or upstream flow measurement. Bailing out!');
+      return null;
+    }
+    const up = host.measurements.type('flow').variant('measured').position('upstream').getCurrentValue();
+    if (up != null) { this.logger.warn('Only upstream flow is present. Using it but results may be incomplete!'); return up; }
+    const dn = host.measurements.type('flow').variant('measured').position('downstream').getCurrentValue();
+    if (dn != null) { this.logger.warn('Only downstream flow is present. Using it but results may be incomplete!'); return dn; }
+    this.logger.error('No upstream or downstream flow measurement. Bailing out!');
+    return null;
+  }
+
+  handleMeasuredPower() {
+    const power = this.host.measurements.type('power').variant('measured').position('atEquipment').getCurrentValue();
+    if (power != null) { this.logger.debug(`Measured power: ${power}`); return power; }
+    this.logger.error('No measured power found. Bailing out!');
+    return null;
+  }
+
+  /** Route a dashboard-sim pressure write to its virtual child; route any
+   *  other simulated measurement type through the normal handler dispatch. */
+  updateSimulatedMeasurement(type, position, value, context = {}) {
+    const host = this.host;
+    const t = String(type || '').toLowerCase();
+    const pos = String(position || 'atEquipment').toLowerCase();
+    if (t !== 'pressure') { return this.dispatch(t, value, pos, context); }
+    if (!host.virtualPressureChildIds[pos]) {
+      this.logger.warn(`Unsupported simulated pressure position '${pos}'`);
+      return;
+    }
+    const child = host.virtualPressureChildren[pos];
+    if (!child?.measurements) {
+      this.logger.error(`Virtual pressure child '${pos}' is missing`);
+      return;
+    }
+    let unit;
+    try { unit = host._resolveMeasurementUnit('pressure', context.unit); }
+    catch (err) { this.logger.warn(`Rejected simulated pressure measurement: ${err.message}`); return; }
+    child.measurements.type('pressure').variant('measured').position(pos)
+      .value(value, context.timestamp || Date.now(), unit);
+  }
 }
 
 module.exports = MeasurementHandlers;