Is there an existing issue for this?

[X] I have searched the existing issues

Product

Hot Chocolate

Describe the bug

Unable to Upload file on a Fusion

Steps to reproduce

I have several applications running on the following ports:

API project one: https://localhost:7002
API project two : https://localhost:7003
Fusion will be merge schema from one and two to unique schema with fusion feature. https://localhost:7001 I placed my code in API project one . Already add .AddType<UploadType>() in program.cs , include GraphQL-Preflight:1 on header and my upload file code below:
```
public async Task<string> UploadTest(IFile file, CancellationToken cancellationToken)
{
 // Return a success message with the elapsed time and the number of files
 return $"{1} files uploaded successfully in {1} seconds";
}
```

Noted: It is working on simple project use hot chocolate. But not working on bff and fusion Please tell me may I was wrong or can I detect root cause of this problem ?

UPDATE:: If I upload file from API project one at https://localhost:7002 it will be success ! But I can't upload it through fusion schema !

Not working on bff and fusion:

Working on simple project

Relevant log output

Microsoft.AspNetCore.Routing.EndpointMiddleware: Information: Executing endpoint 'Hot Chocolate GraphQL Pipeline'
Microsoft.AspNetCore.Routing.EndpointMiddleware: Information: Executed endpoint 'Hot Chocolate GraphQL Pipeline'
Microsoft.AspNetCore.Hosting.Diagnostics: Information: Request finished HTTP/1.1 POST http://localhost:7002/api/graphql - 404 0 - 17.6763ms
System.Net.Http.HttpClient.Common.ClientHandler: Information: Received HTTP response headers after 22.5157ms - 404
System.Net.Http.HttpClient.Common.LogicalHandler: Information: End processing HTTP request after 33.9293ms - 404
Microsoft.AspNetCore.Routing.EndpointMiddleware: Information: Executed endpoint 'Hot Chocolate GraphQL Pipeline'
Microsoft.EntityFrameworkCore.Infrastructure: Debug: 'SessionDbContext' disposed.
Microsoft.EntityFrameworkCore.Database.Connection: Debug: Disposing connection to database 'Sessions' on server 'localhost,1434'.
Microsoft.EntityFrameworkCore.Database.Connection: Debug: Disposed connection to database '' on server '' (1ms).
Microsoft.AspNetCore.Hosting.Diagnostics: Information: Request finished HTTP/2 POST https://localhost:7001/api/graphql - 500 - application/graphql-response+json;+charset=utf-8 132.9250ms

Additional Context?

No response

Version

13.5.0-preview.18

ChilliCream / graphql-platform

Unable to Upload file on a Fusion #6429