I would put the planning in the mindees folder, but would note that the child didn't attend due to illness or whatever, therefore I could not do any observations.
I would do some work with the materials which were the end result of the planning with the mindee who didn't attend like photo's worksheets etc. Or perhaps take mindee to a local pet shop to see some other animals etc, so doesn't feel do left out. You could then link the outcomes as per your post.
I only have the poor poppet one day a week - so it could be tricky short-term but her folder is currently one of the best I have done so I'm not too worried iyswim. She doesn't miss out much as she spends the other days at Nursery
I have decided to go with planning & evaluation for short activities on one sheet