the search indexer reads it with `YHubService`, and the indexation of an
edited document is triggered by the `content-updated` call the collaboration
server makes — nothing else sees the content change anymore. It is queued as
a celery task, throttled like the other updates, so no indexation ever runs
in the process serving the request. A document whose content cannot be read
is left out of the batch rather than indexed empty, which would have erased
it from the search backend
We need to split the core/utils.py in multiple submodule created in
core/utils/*.py. We need to do this to avoir circular import between
this module and the models module.
Manuel Raynaud