fix: correct Node.js version references from 24 to 22 in comments and code

Fixed confusing messaging where comments mentioned Node 24 while actual requirement is Node 22:

- environment.ts: Fixed areWorkerThreadsAvailableSync() to check for >= 22 instead of >= 24
- workerUtils.ts: Updated comments to reference Node.js 22 LTS instead of 24
- embedding.ts: Updated ONNX threading comment to reference Node.js 22 LTS

Why Node 22 not Node 24:
- ONNX Runtime has stability issues in Node 24 (V8 HandleScope crashes)
- Node 22 LTS provides maximum stability with our embedding model
- These stale Node 24 references were causing user confusion

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/utils/embedding.ts

@@ -14,7 +14,7 @@ import { pipeline, env } from '@huggingface/transformers'
 if (typeof process !== 'undefined' && process.env) {
   process.env.ORT_DISABLE_MEMORY_ARENA = '1'
   process.env.ORT_DISABLE_MEMORY_PATTERN = '1'
-  // Force single-threaded operation for maximum stability (Node.js 24 compatibility)
+  // Force single-threaded operation for maximum stability (Node.js 22 LTS)
   process.env.ORT_INTRA_OP_NUM_THREADS = '1'    // Single thread for operators
   process.env.ORT_INTER_OP_NUM_THREADS = '1'    // Single thread for sessions
   process.env.ORT_NUM_THREADS = '1'             // Additional safety override

src/utils/environment.ts

@@ -66,8 +66,8 @@ export async function areWorkerThreadsAvailable(): Promise<boolean> {
 export function areWorkerThreadsAvailableSync(): boolean {
   if (!isNode()) return false
 
-  // In Node.js 24.4.0+, worker_threads is always available
+  // In Node.js 22+, worker_threads is always available
-  return parseInt(process.versions.node.split('.')[0]) >= 24
+  return parseInt(process.versions.node.split('.')[0]) >= 22
 }
 
 /**

src/utils/workerUtils.ts

@@ -1,6 +1,6 @@
 /**
  * Utility functions for executing functions in Worker Threads (Node.js) or Web Workers (Browser)
- * This implementation leverages Node.js 24's improved Worker Threads API for better performance
+ * This implementation leverages Node.js 22's stable Worker Threads API for maximum reliability
  */
 
 import { isBrowser, isNode } from './environment.js'
@@ -82,7 +82,7 @@ export function executeInThread<T>(fnString: string, args: any): Promise<T> {
 
 /**
  * Execute a function in a Node.js Worker Thread
- * Optimized for Node.js 24 with improved Worker Threads performance
+ * Optimized for Node.js 22 LTS with stable Worker Threads performance
  */
 function executeInNodeWorker<T>(fnString: string, args: any): Promise<T> {
   return new Promise<T>((resolve, reject) => {