This PR hooks up the actionable change request data to the counter in
the UI. It:
- creates a getter for the data. It only exposes data. We don't really
care about error or loading for this (it's not an important piece of
data), so we don't expose that just yet.
- Adds orval-generated schema
- Uses the hook in the UI.
It also stwitches the previous "notification badge" for MUI's built-in
badge. We already use that badge component for the event timeline, so I
thought it would make sense to do it here too. Overall, the effect is
pretty good, but there's a few kinks we might wanna work out. I'll make
a follow-up for that (worked out in this PR after all)
