CloudEvents from subscriptions does not follow specifications

[Hoaas]

Description of the bug

CloudEvents received on webhook endpoint for subscriptions have Content-Type application/json, and not application/cloudevents+json as expected for CloudEvents.

This causes the CloudNative .NET Nuget package to not work.

CloudEventFormatter formatter = new JsonEventFormatter();
CloudEvent cloudEvent = await request.ToCloudEventAsync(formatter);

Using this code from the SDK guide gives error regarding missing specversion, as that is expected in http header when Content-Type is application/json. (might be related to structured / unstructured data?)

Steps To Reproduce

1. Create subscription using /events/api/v1/subscriptions endpoint
2. Attempt to read CloudEvent in the way described in CloudEvent guides on .NET
3. Error occurs

Additional Information

No response