Fix ESLint errors, bugs, and add gravity export

- Fix missing return in childRegistrationUtils.registerChild()
- Fix assertionUtils: assertNoNaN uses this.assertNoNaN
- Fix logger: nameModule uses this.nameModule
- Fix assetUtils: convert ESM to CommonJS
- Fix childRegistrationUtils_DEPRECATED: desc -> softwareType
- Add gravity export to index.js for rotatingMachine
- Fix ESLint errors across 18 files (no-undef, no-case-declarations,
  no-mixed-spaces-and-tabs, parsing errors)

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

src/helper/outputUtils.js

@@ -37,14 +37,15 @@ class OutputUtils {
       if (Object.keys(changedFields).length > 0) {
 
         switch (format) {
-          case 'influxdb':  
+          case 'influxdb': {
             // Extract the relevant config properties.
             const relevantConfig = this.extractRelevantConfig(config);
             // Flatten the tags so that no nested objects are passed on.
             const flatTags = this.flattenTags(relevantConfig);
             msg = this.influxDBFormat(changedFields, config, flatTags);
-            
+
             break;
+          }
 
           case 'process':