schema + asset menu fixes

- configs/machineGroupControl.json: drop prioritypercentagecontrol mode
  (unused — set.demand became unit-self-describing, so percentage-vs-absolute
  is decided per-message, not by a node-wide scaling mode). Add output.process
  / output.dbase enums + functionality.distance{,Unit,Description} so the
  editor's distance offset persists. Fixes the runtime warnings 'Unknown key
  optimization/scaling/movement/curvePressureUnit etc.' the validator was
  logging on every MGC instantiation.
- configs/measurement.json: same output.process/dbase block + nullable
  position.x for the rare case a measurement has no parent yet.
- datasets/assetData/machine.json -> rotatingmachine.json: rename so
  AssetMenu's softwareType lookup matches. AssetMenu.getActiveCategoryKey
  no longer silently falls back to keys[0] (which mis-showed diffuser models
  for rotatingMachine nodes) — returns null with a console.warn instead.
- menu/asset.js: re-derive supplier/assetType from saved model id on reopen.
  The save handler intentionally discards the denormalized registry copies
  to keep the persisted node small, so the cascade dropdown booted at
  'Select...' even when a model was saved. Walk the registry tree to
  reconstitute.
- predict/predict_class.js: minor.
- configs/index.js: minor.

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

src/configs/measurement.json

@@ -96,10 +96,37 @@
             "default": null,
             "rules": {
                 "type": "number",
+                "nullable": true,
                 "description": "Defines the position of the measurement relative to its parent equipment or system."
             }
         }
     },
+    "output": {
+        "process": {
+            "default": "process",
+            "rules": {
+                "type": "enum",
+                "values": [
+                    { "value": "process", "description": "Delta-compressed process message (default)." },
+                    { "value": "json", "description": "Raw JSON payload." },
+                    { "value": "csv", "description": "CSV-formatted payload." }
+                ],
+                "description": "Format of the process payload emitted on output port 0."
+            }
+        },
+        "dbase": {
+            "default": "influxdb",
+            "rules": {
+                "type": "enum",
+                "values": [
+                    { "value": "influxdb", "description": "InfluxDB line-protocol payload (default)." },
+                    { "value": "json", "description": "Raw JSON payload." },
+                    { "value": "csv", "description": "CSV-formatted payload." }
+                ],
+                "description": "Format of the telemetry payload emitted on output port 1."
+            }
+        }
+    },
     "asset": {
         "uuid": {
             "default": null,