[TOOLING] sql queries to remove unused documents and ngrams from database. Usage: use a crontab to execute it every week for instance.

Also, fixed morpheus version: turns out one can unprefix without a
patch to current library.

https://github.com/morpheusgraphql/morpheus-graphql/pull/639#issuecomment-962113983

Merge branch '86-dev-graphql' of ssh://gitlab.iscpif.fr:20022/gargantext/haskell-gargantext into 86-dev-graphql

Also, add "Advanced" endpoint for node list update to update charts.