P5 wave 1: extract rotatingMachine concerns into focused modules

src/curves/         loader + normalizer (with cross-pressure anomaly
                      detection) + reverseCurve helper
  src/prediction/     predictors (predictFlow/Power/Ctrl) +
                      groupPredictors (lazy group-scope views) +
                      OperatingPoint (pressure-driven prediction setpoints)
  src/drift/          DriftAssessor (per-metric drift) + PredictionHealth
                      (composes flow/power/pressure into HealthStatus +
                      confidence sibling — see OPEN_QUESTIONS 2026-05-10)
  src/pressure/       VirtualPressureChildren (dashboard-sim) +
                      PressureInitialization (real-vs-virtual tracking) +
                      PressureRouter (dispatches by position)
  src/state/          stateBindings (state.emitter listener helper) +
                      isOperationalState
  src/measurement/    measurementHandlers (dispatcher for flow/power/temp/pressure)
  src/flow/           flowController (handleInput body — execSequence,
                      execMovement, flowMovement, emergencystop)
  src/display/        workingCurves (showWorkingCurves + showCoG admin)
  src/commands/       canonical names: set.mode, cmd.startup/shutdown/estop,
                      set.setpoint, set.flow-setpoint,
                      data.simulate-measurement, query.curves, query.cog,
                      child.register. execSequence demuxes by payload.action
                      to canonical cmd.* handlers.
  CONTRACT.md         inputs/outputs/events/children surface

110 basic tests pass (100 new + 10 pre-existing).
specificClass.js / nodeClass.js untouched — integration in P5 wave 2.

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

test/basic/curveLoader.basic.test.js

@@ -0,0 +1,30 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const { loadModelCurve } = require('../../src/curves/curveLoader');
+
+test('curveLoader: valid model returns rawCurve and null error', () => {
+  const result = loadModelCurve('hidrostal-H05K-S03R');
+  assert.equal(result.error, null);
+  assert.ok(result.rawCurve);
+  assert.ok(result.rawCurve.np);
+  assert.ok(result.rawCurve.nq);
+});
+
+test('curveLoader: missing model returns Model not specified', () => {
+  const result = loadModelCurve('');
+  assert.equal(result.rawCurve, null);
+  assert.equal(result.error, 'Model not specified');
+});
+
+test('curveLoader: undefined model returns Model not specified', () => {
+  const result = loadModelCurve(undefined);
+  assert.equal(result.rawCurve, null);
+  assert.equal(result.error, 'Model not specified');
+});
+
+test('curveLoader: unknown model returns Curve not found error', () => {
+  const result = loadModelCurve('this-model-does-not-exist');
+  assert.equal(result.rawCurve, null);
+  assert.match(result.error, /Curve not found for model/);
+});