Weno follow up (#7196)

Weno follow up (#7196)

* Weno follow up
- correct interval for WenoExchange
- add after actions to enable, disable and delete background tasks.

* - review escaping and some performance refactors
- find and populate user id to prescription table.
- remove encounter dependency to render weno prescription frame.
- add docblocks
- restore README module install instruction.

* - a version v6.0.0 background task requierement left for legacy
- remove encounter requirement my call
- fix user specific password get
- remove weno from custom menu.

* - remove all references for old weno drugs feature.
- remove tasking call for old background tasks.