Subscribes to a broader telemetry topic

Updates the MQTT client to subscribe to all subtopics under "telemetry"
using the wildcard "#". This allows the client to receive messages from various telemetry sources, improving data ingestion.

Source/ProofOfConcept/Services/MQTTClient.cs

@@ -41,7 +41,7 @@ public class MQTTClient : IHostedService
         await this.client.ConnectAsync(options, cancellationToken);
         this.logger.LogTrace("Connected");
 
-        await this.client.SubscribeAsync("telemetry", cancellationToken: cancellationToken);
+        await this.client.SubscribeAsync("telemetry/#", cancellationToken: cancellationToken);
         this.logger.LogTrace("Subscribed");
         
         this.logger.LogInformation("Started");