fix: handle unexpected state when a record is viewed before registration confirmation

[rikukissa]

Root cause:

1. User registers a record and it is sent to country config for validation
2. Before it is confirmed, some user views the record causing its task history to change
3. Record gets confirmed by CC, but now the "previous task" is the view task and not the awaiting validation task

[euanmillar]

LGTM!

[makelicious]

Looks good. I checked other uses of createNewTaskResource and unless there are more non-null assertions way up in the chain, we should be good.

If we feel extra paranoid, we could clean up the incoming extensions in createNewTaskResource. However, it does not address any specific issue but rather vaguely just "deals with it", even if it should not happen anymore.

[rikukissa]

Thanks for the review! Yea, I tend to err on the side of not dong anything "just in case" so the code always represents the real known cases. I clarified the tests and addressed other feedback