test(mgc): drop denormalized asset fields from integration fixtures

Each fixture's machineConfig() now passes asset: { model, unit } only —
the supplier / category / type strings are derived at runtime via
assetResolver in rotatingMachine's _setupCurves. Six integration tests
updated. No behaviour change.

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

test/integration/idle-startup-deadlock.integration.test.js

@@ -39,7 +39,7 @@ function machineConfig(id) {
   return {
     general: { logging: logCfg, name: id, id, unit: 'm3/h' },
     functionality: { softwareType: 'machine', role: 'rotationaldevicecontroller' },
-    asset: { category: 'pump', type: 'centrifugal', model: 'hidrostal-H05K-S03R', supplier: 'hidrostal' },
+    asset: { model: 'hidrostal-H05K-S03R', unit: 'm3/h' },
     mode: {
       current: 'auto',
       allowedActions: { auto: ['execsequence', 'execmovement', 'flowmovement', 'statuscheck'] },