SECURITY: Remove credential exposure from logs

- Replace full config logging with sanitized version
- Credentials now show as [REDACTED] in console logs
- Fixed in: enhanced-screenshot service, API routes, test files
- Prevents TradingView email/password from appearing in container logs

app/api/enhanced-screenshot/route.js

@@ -71,7 +71,13 @@ export async function POST(request) {
       }
     }
 
-    console.log('🔧 Using config:', config)
+    console.log('🔧 Using config:', {
+      symbol: config.symbol,
+      timeframe: config.timeframe,
+      layouts: config.layouts,
+      sessionId: config.sessionId,
+      credentials: '[REDACTED]'
+    })
 
     let screenshots = []
     let analysis = null