Incremental suggestion caching #768
Description
Whenever we change the data model of cached suggestions, we currently have to recache all the suggestions. Since #714 this will make all views that contain suggestions go 500 because the unconditionally rely on the cached value. The downtime will go up linearly with number of suggestions...
Implementation notes
- Show a placeholder when a given suggestion is pending a cached value
- Trigger recaching on access
- Bonus points for auto-replacement via websocket when done