Mokhtar

I've done some research over the last few days with a relatively large dataset to give us an idea of how much disk space we could save for large instances....

Rebasing the [PR](https://github.com/medic/cht-core/pull/9308) against `4.10.x` and applying the changes mentioned in this thread brought the size of `medic-client` down to 9.8GB from 10.2GB :eyes:

Thanks for the prod data and the words of caution @mrjones-plip I pulled it down, made CouchDB index it and warm up the views, and then pushed the new freetext...