Store license diff screenshot in database instead of uploading to github

[rtgdk]

Currently we upload the diff of the license text on a separate diff repo (see DIFF_REPO_WITH_OWNER in settings.py). Instead of uploading to github, we can directly save the static file in the database. Django provides BinaryField to store raw binary data.

Some links, articles and group conversations.

1. https://docs.djangoproject.com/en/3.1/ref/models/fields/#binaryfield
2. https://groups.google.com/g/django-developers/c/5wRAbViLf1s
3. https://wiki.postgresql.org/wiki/BinaryFilesInDB

[Ugtan]

@rtgdk I don't think so it would be a good idea to use binaryField, I know the number of screenshots would be less but considering the warning on the Django official docs reference here. Also, the StackOverflow answer says that we might face some issues related to caching if we use binaryField reference. What are your thoughts about this?

[rtgdk]

@Ugtan I think we should be good. Having extra columns in sql is fine. We don't expect to have a lot of these. Keeping a separate repo is quite a hassle to setup.

[Ugtan]

@rtgdk Okay perfect.

[jlovejoy]

@rtgdk - was this resolved and can close issue?

[goneall]

@jlovejoy - not resolved yet - a good idea, but probably lower priority to other issues.