feat: add node: protocol to all Node.js built-in imports for bundler compatibility

- Updated all fs, path, crypto, os, url, util, events, http, https, net, child_process, stream, and zlib imports
- Changed both static imports and dynamic imports to use node: protocol
- This makes Brainy more bundler-friendly by explicitly marking Node.js built-ins
- Prevents bundlers from attempting to polyfill or bundle these modules
- Reduces bundle size for web applications using Brainy
- Improves tree-shaking and dead code elimination

Benefits for external bundlers:
- Clear distinction between Node.js built-ins and external dependencies
- No ambiguity about what needs polyfilling
- Smaller bundles for browser builds
- Better compatibility with modern bundlers (Webpack 5, Vite, Rollup, esbuild)

🤖 Generated with Claude Code

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

src/distributed/cacheSync.ts

@@ -3,7 +3,7 @@
  * Provides cache coherence across multiple Brainy instances
  */
 
-import { EventEmitter } from 'events'
+import { EventEmitter } from 'node:events'
 
 export interface CacheSyncConfig {
   nodeId: string

src/distributed/coordinator.ts

@@ -3,9 +3,9 @@
  * Provides leader election, consensus, and coordination for distributed instances
  */
 
-import { EventEmitter } from 'events'
+import { EventEmitter } from 'node:events'
 import { NetworkTransport, NetworkMessage } from './networkTransport.js'
-import { createHash } from 'crypto'
+import { createHash } from 'node:crypto'
 
 export interface NodeInfo {
   id: string

src/distributed/httpTransport.ts

@@ -4,11 +4,11 @@
  * REAL PRODUCTION CODE - Handles millions of operations
  */
 
-import * as http from 'http'
-import * as https from 'https'
-import { EventEmitter } from 'events'
-import * as net from 'net'
-import { URL } from 'url'
+import * as http from 'node:http'
+import * as https from 'node:https'
+import { EventEmitter } from 'node:events'
+import * as net from 'node:net'
+import { URL } from 'node:url'
 
 export interface TransportMessage {
   id: string

src/distributed/networkTransport.ts

@@ -3,8 +3,8 @@
  * Uses WebSocket + HTTP for maximum compatibility
  */
 
-import * as http from 'http'
-import { EventEmitter } from 'events'
+import * as http from 'node:http'
+import { EventEmitter } from 'node:events'
 import { WebSocket } from 'ws'
 
 // Use dynamic imports for Node.js specific modules
@@ -378,7 +378,7 @@ export class NetworkTransport extends EventEmitter {
     
     try {
       // Query Kubernetes API for pod endpoints
-      const https = await import('https')
+      const https = await import('node:https')
       const response = await new Promise<any>((resolve, reject) => {
         https.get(
           `${apiServer}/api/v1/namespaces/${namespace}/endpoints/${serviceName}`,

src/distributed/readWriteSeparation.ts

@@ -3,7 +3,7 @@
  * Implements primary-replica architecture for scalable reads
  */
 
-import { EventEmitter } from 'events'
+import { EventEmitter } from 'node:events'
 import { DistributedCoordinator } from './coordinator.js'
 import { ShardManager } from './shardManager.js'
 import { CacheSync } from './cacheSync.js'

src/distributed/shardManager.ts

@@ -3,8 +3,8 @@
  * Implements consistent hashing for data distribution across shards
  */
 
-import { createHash } from 'crypto'
-import { EventEmitter } from 'events'
+import { createHash } from 'node:crypto'
+import { EventEmitter } from 'node:events'
 
 export interface ShardConfig {
   shardCount?: number

src/distributed/shardMigration.ts

@@ -5,7 +5,7 @@
  * Uses streaming for efficient transfer of large datasets
  */
 
-import { EventEmitter } from 'events'
+import { EventEmitter } from 'node:events'
 import type { StorageAdapter } from '../coreTypes.js'
 import type { ShardManager } from './shardManager.js'
 import type { HTTPTransport } from './httpTransport.js'

src/distributed/storageDiscovery.ts

@@ -4,8 +4,8 @@
  * REAL PRODUCTION CODE - No mocks, no stubs!
  */
 
-import { EventEmitter } from 'events'
-import * as os from 'os'
+import { EventEmitter } from 'node:events'
+import * as os from 'node:os'
 import { StorageAdapter } from '../coreTypes.js'
 
 export interface NodeInfo {