add telemetry phase when subscription config errors

[michaelcaterisano]

What

Ensuring that telemetry events are fired when subscription config returns an error

Why

We would like to be able to hook into these events even when subscription config returns an error.

Testing

Wrote a new test to check that this functionality works. I'd also note that there are three failing tests on main that are unrelated to this change.

[cschiewek]

I think there's room for improvement here, as this can still potentially discard phases we might want to run, but likely out of scope for this PR. 👍