Use Django's session write-through cache

This ensures that session data can be retained over clear_cache, and also be investigated easier.

added part::backend label

assigned to @hansegucker

marked this merge request as draft

added 1045 commits

• 055f8e91...e1b3797d - 1044 commits from branch master
• f0ac1b58 - Merge branch 'master' into 'sessions-cached-db'

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marked this merge request as ready

added 60 commits

• f0ac1b58...eeca2dd2 - 59 commits from branch master
• 66bd7d8b - Merge branch 'master' into 'sessions-cached-db'

Compare with previous version

merged

mentioned in commit b08e8819