Add safe logging utility for credential protection

- Created lib/safe-logging.ts with utilities for safe logging
- logConfigSafely() automatically redacts credentials field
- logSafely() redacts common sensitive fields (password, email, token, etc)
- Updated enhanced-screenshot service to use safe logging utility
- Provides reusable pattern for secure logging throughout codebase

lib/enhanced-screenshot.ts

@@ -4,6 +4,7 @@ import path from 'path'
 import puppeteer from 'puppeteer'
 import { Browser, Page } from 'puppeteer'
 import { progressTracker, ProgressStep } from './progress-tracker'
+import { logConfigSafely } from './safe-logging'
 
 export interface ScreenshotConfig {
   symbol: string
@@ -28,13 +29,7 @@ export class EnhancedScreenshotService {
 
   async captureWithLogin(config: ScreenshotConfig): Promise<string[]> {
     console.log('🚀 Enhanced Screenshot Service - Docker Environment (Dual Session)')
-    console.log('📋 Config:', {
-      symbol: config.symbol,
-      timeframe: config.timeframe,
-      layouts: config.layouts,
-      sessionId: config.sessionId,
-      credentials: '[REDACTED]'
-    })
+    logConfigSafely(config)
     
     const screenshotFiles: string[] = []
     const { sessionId } = config