Migrate _loadConfig to use ConfigManager.buildConfig()

Replaces manual base config construction with shared buildConfig() method.
Node now only specifies domain-specific config sections.

Part of #1: Extract base config schema

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/nodeClass.js

@@ -42,32 +42,13 @@ class nodeClass {
    * @param {object} uiConfig - Raw config from Node-RED UI.
    */
   _loadConfig(uiConfig,node) {
+    // Resolve flow unit with validation before building config
     const flowUnit = this._resolveUnitOrFallback(uiConfig.unit, 'volumeFlowRate', 'm3/h', 'flow');
+    const resolvedUiConfig = { ...uiConfig, unit: flowUnit };
 
-    // Merge UI config over defaults
-    this.config = {
-      general: {
-        name: uiConfig.name,
-        id: node.id, // node.id is for the child registration process
-        unit: flowUnit,
-        logging: {
-          enabled: uiConfig.enableLog,
-          logLevel: uiConfig.logLevel
-        }
-      },
-      asset: {
-        uuid: uiConfig.uuid || uiConfig.assetUuid || null,
-        tagCode: uiConfig.tagCode || uiConfig.assetTagCode || null,
-        supplier: uiConfig.supplier,
-        category: uiConfig.category, //add later to define as the software type 
-        type: uiConfig.assetType,
-        model: uiConfig.model,
-        unit: flowUnit
-      },
-      functionality: {
-        positionVsParent: uiConfig.positionVsParent || 'atEquipment', // Default to 'atEquipment' if not specified
-      }
-    };
+    // Build config: base sections handle general, asset, functionality
+    const cfgMgr = new configManager();
+    this.config = cfgMgr.buildConfig(this.name, resolvedUiConfig, node.id);
 
     // Utility for formatting outputs
     this._output = new outputUtils();