.Net Exception "Content type application/json does not have a factory registered to be parsed" using C# API Client

### What are you generating using Kiota, clients or plugins?

API Client/SDK

### In what context or format are you using Kiota?

Nuget tool

### Client library/SDK language

Csharp

### Describe the bug

Calling await client.Route.GetAsync throws and Exception "Content type application/json does not have a factory registered to be parsed".

I struggle to understand the Exception. I assume there is a problem deserializing the json response that returned from the server.

I hope you can clearify the problem and make it understandable for me.

Thanks in advance.

Btw - I am not sure if this ticket is actually a bug ... I think im just missing something using the client...

### Expected behavior
Content type application/json should have a factory registered.
Why is it not initialized within the client initialization? Return format should be known from openapi-spec.

### How to reproduce

I have generated a C#-ClientLibrary for the [Graphhopper API](https://docs.graphhopper.com/openapi) as shown below:

```
{
"applicationName": "application",
"apiDependencies": {
"GraphhopperApiClient": {
"apiDescriptionUrl": "c:\\Users\\klara\\Downloads\\openapi.json",
"apiDeploymentBaseUrl": "https://graphhopper.com/api/1/",
"requests": [
{
"method": "GET",
"uriTemplate": "route"
},
{
"method": "POST",
"uriTemplate": "route"
},
{
"method": "POST",
"uriTemplate": "matrix"
},
{
"method": "GET",
"uriTemplate": "matrix"
},
{
"method": "POST",
"uriTemplate": "vrp"
}
],
"extensions": {
"x-ms-kiota-hash": "6E7836590F7BEABE147D318372748B57AB692D213FE7C07A535B66F5FE789CE9",
"x-ms-kiota-version": "1.28.0"
}
}
}
}
```

I have imported the generated sources in my C# project and downloaded the required Kiota Dependencies using NuGet.

Application looks like this:

```
using Microsoft.Kiota.Abstractions;
using Microsoft.Kiota.Abstractions.Authentication;
using Microsoft.Kiota.Abstractions.Serialization;
using Microsoft.Kiota.Http.HttpClientLibrary;
using Microsoft.Kiota.Serialization.Json;
using System.Text.Json;
using static Lovion.Route.RouteRequestBuilder;
using static Microsoft.Kiota.Abstractions.Authentication.ApiKeyAuthenticationProvider;

async Task MainAsync() {
// AUTHENTICATION EXAMPLE
var apiKeyAdapter = new ApiKeyAuthenticationProvider("redacted", "X-API-Key", ApiKeyAuthenticationProvider.KeyLocation.QueryParameter);
var requestAdapter = new HttpClientRequestAdapter(apiKeyAdapter);
requestAdapter.BaseUrl = "https://klara:8989";
Lovion.GraphhopperApiClient client = new GraphhopperApiClient(requestAdapter);

// CALCULATE ROUTE EXAMPLE
Lovion.Models.RouteResponse route = await client.Route.GetAsync(q =>
{
q.QueryParameters.Point = ["50.58727,8.67554", "50.58727,7.67554"];
q.QueryParameters.Profile = "car";
});
}
await MainAsync();
```

### Open API description file
[openapi.json](https://github.com/user-attachments/files/21823857/openapi.json)

### Kiota Version

Should be 1.28.0

### Latest Kiota version known to work for scenario above?(Not required)

_No response_

### Known Workarounds

_No response_

### Configuration

- OS: Windows 11
- architecture: x64

### Debug output

Click to expand log
```

```

### Other information

_No response_