Fix coroutine warning and replace MQTT client loop handling

- Properly awaited the `on_connect` method to resolve RuntimeWarning.
- Replaced `loop_forever()` with an async event loop using `asyncio.get_event_loop().create_future()`.

dayglo_detector/dayglo_detector.py

@@ -33,7 +33,7 @@ initial_snapshot_processed = False
 connected_once = False
 
 class DaygloDetectorMQTTClient(MQTTClient):
-    async def on_connect(self, client, flags, rc, properties):
+    async async def on_connect(self, client, flags, rc, properties):
         global connected_once
         if rc == 0 and not connected_once:
             print("Connected successfully to MQTT broker")
@@ -134,7 +134,8 @@ async def main():
     client.set_auth_credentials(MQTT_USERNAME, MQTT_PASSWORD)
 
     await client.connect(MQTT_BROKER, MQTT_PORT, keepalive=60)
-    client.loop_forever()
+    await client.connect(MQTT_BROKER, MQTT_PORT, keepalive=60)
+    await asyncio.get_event_loop().create_future()
 
 if __name__ == "__main__":
     asyncio.run(main())