Update documentation for OpenTelemetry configuration support

Co-authored-by: aaronpowell <434140+aaronpowell@users.noreply.github.com>

Author: Copilot

src/CommunityToolkit.Aspire.OllamaSharp/README.md

@@ -37,6 +37,17 @@ public class MyService(IOllamaApiClient ollamaApiClient)
 
 To use the integration with Microsoft.Extensions.AI, call the `AddOllamaSharpChatClient` or `AddOllamaSharpEmbeddingGenerator` extension method in the _Program.cs_ file of your project. These methods take the connection name as a parameter, just as `AddOllamaApiClient` does, and will register the `IOllamaApiClient`, as well as the `IChatClient` or `IEmbeddingGenerator` in the DI container. The `IEmbeddingsGenerator` is registered with the generic arguments of `<string, Embedding<float>>`.
 
+#### Configuring OpenTelemetry
+
+When using the chat client integration, you can optionally configure the OpenTelemetry chat client to control telemetry behavior such as enabling sensitive data:
+
+```csharp
+builder.AddOllamaApiClient("ollama")
+    .AddChatClient(otel => otel.EnableSensitiveData = true);
+```
+
+The integration automatically registers the Microsoft.Extensions.AI telemetry source (`Experimental.Microsoft.Extensions.AI`) with OpenTelemetry for distributed tracing.
+
 ## Additional documentation
 
 -   https://github.com/awaescher/OllamaSharp