Fix ESLint errors and bugs

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

src/nodeClass.js

@@ -32,12 +32,13 @@ class nodeClass {
     this.node.on('input', (msg, send, done) => {
 
       switch (msg.topic) {
-        case 'registerChild':
+        case 'registerChild': {
           // Register this node as a parent of the child node
           const childId = msg.payload;
-          const childObj = this.RED.nodes.getNode(childId); 
+          const childObj = this.RED.nodes.getNode(childId);
           this.source.childRegistrationUtils.registerChild(childObj.source, msg.positionVsParent);
           break;
+        }
         default:
           console.log("Unknown topic: " + msg.topic);
       }