Test scripts (Python)

Setup:

```bash
cd test
python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
```

Run publisher (connects to MQTT TCP 1883 by default):

```bash
python publish_sample.py
```

Run websocket test (connects to wss://dev.hub.umagul.net/mqtt by default):

```bash
python test_ws_mqtt.py
```

Environment variables:
- `MQTT_HOST`, `MQTT_PORT`, `MQTT_PATH`, `MQTT_TOPIC`
- `MQTT_USERNAME`, `MQTT_PASSWORD` for auth
- `TLS_VERIFY=false` to skip TLS validation for testing