Rachael Robinson

Feature/redbox 234 keep deleted file django reference

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## Context After discussion with the wider product team about managing deleted documents, we decided to keep a reference to files in the Django database when the files were deleted...

## Context There was a weird issue locally where users weren't able to access /chat because of how we were generating the chat url. ## Changes proposed in this pull...

## Context Recent changes in #1071 have broken the local environment for users, as redbox-core was making reference to an Elastic alias that did not exist without running the `add_es_alias`...