Fix username not passed to script deployment

- Include username and port in scan_complete WebSocket event
- Pass username from scan data when deploying scripts

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/components/DiscoveryResults.jsx

@@ -85,7 +85,10 @@ export default function DiscoveryResults({ scanId, scan, analysis, devMode, onCo
         monitorId,
         scan.hostname,
         pushMetric,
-        { port: scan.port || 22 }
+        {
+          port: scan.port || 22,
+          username: scan.username || 'root'
+        }
       );
 
       // Update the result with new deployment status