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/state/sequenceController.js

@@ -0,0 +1,86 @@
+/**
+ * Sequence + setpoint orchestration. Pre-refactor lived inline on
+ * Machine; extracted so the orchestrator stays focused. All behaviour
+ * is preserved verbatim including the interruptible-shutdown abort
+ * dance and the operational-state ramp-to-zero before shutdown.
+ */
+
+function resolveSetpointBounds(host) {
+  const stateMin = Number(host.state?.movementManager?.minPosition);
+  const stateMax = Number(host.state?.movementManager?.maxPosition);
+  const curveMin = Number(host.predictFlow?.currentFxyXMin);
+  const curveMax = Number(host.predictFlow?.currentFxyXMax);
+  const minCands = [stateMin, curveMin].filter(Number.isFinite);
+  const maxCands = [stateMax, curveMax].filter(Number.isFinite);
+  const fbMin = Number.isFinite(stateMin) ? stateMin : 0;
+  const fbMax = Number.isFinite(stateMax) ? stateMax : 100;
+  let min = minCands.length ? Math.max(...minCands) : fbMin;
+  let max = maxCands.length ? Math.min(...maxCands) : fbMax;
+  if (min > max) {
+    host.logger.warn(`Invalid setpoint bounds detected (min=${min}, max=${max}). Falling back to movement bounds.`);
+    min = fbMin; max = fbMax;
+  }
+  return { min, max };
+}
+
+async function setpoint(host, target) {
+  try {
+    if (!Number.isFinite(target)) { host.logger.error('Invalid setpoint: Setpoint must be a finite number.'); return; }
+    const { min, max } = resolveSetpointBounds(host);
+    const constrained = Math.min(Math.max(target, min), max);
+    if (constrained !== target) host.logger.warn(`Requested setpoint ${target} constrained to ${constrained} (min=${min}, max=${max})`);
+    host.logger.info(`Setting setpoint to ${constrained}. Current position: ${host.state.getCurrentPosition()}`);
+    await host.state.moveTo(constrained);
+  } catch (e) { host.logger.error(`Error setting setpoint: ${e}`); }
+}
+
+function waitForOperational(host, timeoutMs = 2000) {
+  if (host.state.getCurrentState() === 'operational') return Promise.resolve('operational');
+  return new Promise((resolve) => {
+    let done = false;
+    const timer = setTimeout(() => {
+      if (done) return;
+      done = true;
+      host.state.emitter.off('stateChange', onChange);
+      resolve(host.state.getCurrentState());
+    }, timeoutMs);
+    const onChange = (newState) => {
+      if (done) return;
+      if (newState === 'operational') {
+        done = true; clearTimeout(timer);
+        host.state.emitter.off('stateChange', onChange);
+        resolve('operational');
+      }
+    };
+    host.state.emitter.on('stateChange', onChange);
+  });
+}
+
+async function executeSequence(host, rawName) {
+  const name = typeof rawName === 'string' ? rawName.toLowerCase() : rawName;
+  const sequence = host.config.sequences[name];
+  if (!sequence || sequence.size === 0) {
+    host.logger.warn(`Sequence '${name}' not defined.`);
+    return;
+  }
+  const interruptible = new Set(['shutdown', 'emergencystop']);
+  if (interruptible.has(name)) host.state.delayedMove = null;
+  const current = host.state.getCurrentState();
+  if (interruptible.has(name) && (current === 'accelerating' || current === 'decelerating')) {
+    host.logger.warn(`Sequence '${name}' requested during '${current}'. Aborting active movement.`);
+    host.state.abortCurrentMovement(`${name} sequence requested`, { returnToOperational: true });
+    await waitForOperational(host, 2000);
+  }
+  if (host.state.getCurrentState() === 'operational' && name === 'shutdown') {
+    host.logger.info(`Machine will ramp down to position 0 before performing ${name} sequence`);
+    await setpoint(host, 0);
+  }
+  host.logger.info(` --------- Executing sequence: ${name} -------------`);
+  for (const s of sequence) {
+    try { await host.state.transitionToState(s); }
+    catch (e) { host.logger.error(`Error during sequence '${name}': ${e}`); break; }
+  }
+  host.updatePosition();
+}
+
+module.exports = { setpoint, executeSequence, resolveSetpointBounds, waitForOperational };