Allow new support requests from deleted email threads

When a support request created from an email thread is deleted, any subsequent replies to that same thread are ignored and do not create a new request. This can easily lead to important customer responses being missed.

It would be helpful if deleted requests no longer blocked new request creation from the same email thread, or if there were an option to automatically create a new request when a reply is received after the original request has been deleted. Alternatively, allowing related requests to be linked together would also improve the workflow.

This would help prevent lost customer communication while preserving the context of the conversation.