Event-driven connection handling

[kwsantiago]

Problem

Current code uses sleep() polling loops to wait for connection state changes:

while (!state->connected && !state->failed) {
    lws_service(context, 50);
    usleep(10000);
}

This wastes CPU cycles and adds latency.

Solution

Use libwebsockets callback-driven model properly:

1. Set connection state in LWS_CALLBACK_CLIENT_ESTABLISHED
2. Use lws_service() with appropriate timeout
3. Remove sleep loops entirely

Benefits

• Lower latency on connect
• Reduced CPU usage
• Cleaner event flow