BUG: No Notification raised for a task run that needs approval

[zhen0]

Description

When a task run has a manual only trigger it can be approved in the UI. In Cloud we raise a notification about the task run that needs approval. We have some of the code for this in server but it's not fully working i.e. no notification is given.

Expected Behavior

When I run a flow that has a task with manual approval, server creates a notification to let me know it needs approving.

Reproduction

Create a flow with a manual_ only trigger and register and run it in server. You should see a notification that it needs approval but won't.

Environment