Draft: Resolve "Create notifications for announcement"

Closes #185

changed milestone to %2.0a2

added part::backend type::feature workflow::confirmed labels

removed milestone

added 556 commits

• 81c75fcc...f90161bc - 556 commits from branch master

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added 1 commit

• e2a4e505 - Create notifications after a new announcement was created

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unmarked as a Work In Progress

assigned to @hansegucker

marked as a Work In Progress

added 2242 commits

• e2a4e505...b37dbc86 - 2241 commits from branch master
• 8aa55a30 - Create notifications after a new announcement was created

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added 1 commit

• f2cb2859 - Schedule notification correctly

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added 1 commit

• 4f96d3b9 - Schedule notification correctly

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marked this merge request as ready

resolved all threads

added 1 commit

• 6c885b06 - Decrease count of database operations

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added 1 commit

• 9091ad87 - Fix linting issues

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added 1 commit

• c1d4b8f9 - Fix linting issues

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added 1 commit

• 978abe76 - Fix linting issues

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assigned to @nik and unassigned @hansegucker