fix(flow): only validate pending dependencies when moving to completed

[roggervalf]

Why

1. Why is this change necessary? When parent is moved to failed, error should be saved saved, even if there are pending dependencies. As it will be moved to failed anyway, better to preserve the real error. Pending dependencies must be validated only when trying to move a parent to completed

How

1. How did you implement this? Before validating the quantity of pending dependencies, check that we are trying to move parent to completed

Additional Notes (Optional)

Any extra info here.