v12 to v13 migration guide doesn't contain information about ISocketSessionInterceptor interface changes

Is there an existing issue for this?

• I have searched the existing issues

Product

Hot Chocolate

Describe the bug

In my project I use an implementation of the ISocketSessionInterceptor to do authentication of the websocket sessions.

After updating from HotChocolate 12 to 13, the ISocketSessionInterceptor interface has changed.

It would be great to have a section about the interface changes in the migration docs.

My main issue is that the OnConnectAsync method's message parameter (in v13 connectionInitMessage) has changed type from InitializeConnectionMessage to IOperationMessagePayload. I was using the message.Payload property which is not there anymore on the new interface-type. I'm not sure how to fix this.

Steps to reproduce

1. Use HotChocolate v12
2. Use the ISocketSessionInterceptor interface
3. Update to HotChocolate v13
4. Implementation is broken

Relevant log output

No response

Additional Context?

If I figure out how to fix this, I'll gladly add the information to the migration guide myself and create a PR.

Version

13.7.0

Read the ISocketSessionInterceptor interface in the v12 and v13 code and compare the OnConnectAsync message parameter types. Then review the v12-to-v13 migration guide and determine how users should replace the missing message.Payload access. Done means the guide documents the interface changes and the migration path clearly.