Resolve "Remove unused Activities code"

keep history tracking and remove activity tracking for memberships, groups, stars The activity data is not used anywhere.

Closes #162 (closed)

DB migration and removal of translation keys will go to a separate commit.

added 1 commit

• 661787a5 - Remove activity tracking

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• bea26751 - Remove activity tracking

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added 1 commit

• cdcf3a86 - Remove activity tracking

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enabled an automatic merge when the pipeline for cdcf3a86 succeeds

mentioned in commit b4525f74

merged