Add realtime WebSocket updates across all async operations

[saeedvaziry]

• Introduces a WebSocket server and socket event infrastructure (SocketEvent, SocketEventDTO, EventsHandler) so the frontend receives live push updates instead of polling
• All queued jobs (deployments, servers, services, workers, sites, firewall, SSL, redirects, scripts, commands, backups, workflow runs, PHP extensions) now dispatch typed socket events on completion or failure; frontend pages use useRealtime / useSocketListener hooks to update tables and status badges in realtime
• Removes the global auto-refresh component and usePageActive hook now that all data updates are pushed via WebSocket; adds useLogContent hook for streaming log output without polling

Fixes #862