Add data check system

Related to AlekSIS-App-Alsijil#91 (closed)

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

mentioned in merge request AlekSIS-App-Alsijil!92 (merged)

added 2 commits

• 9077105d - Add missing email templates
• 290b8469 - [Data checks] Add missing preferences and register model in Django admin

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added 1 commit

• 3c931c03 - Add __str__ method for data check result model

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added 33 commits

• 3c931c03...43646b16 - 31 commits from branch master
• 2ba166fb - Merge branch 'master' into feature/data-checks
• c01fb375 - Merge branch 'master' into feature/data-checks

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added 1 commit

• 922f3959 - Refactor data check views to class-based views

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added 1 commit

• 16a90f04 - Fix lint issues

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added 31 commits

• 16a90f04...be6c4a56 - 30 commits from branch master
• 79bbb7b7 - Merge branch 'master' into feature/data-checks

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added 1 commit

• c8391845 - Add custom health check for data checks

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added 1 commit

• 09479399 - Add permissions for data check views

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added 1 commit

• 79b991a3 - Fix celery usage in system status page after celery upgrade

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added 57 commits

• 79b991a3...6563144f - 55 commits from branch master
• 786ee5f7 - Merge branch 'master' into feature/data-checks
• 8ca2b645 - Merge migrations

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added 1 commit

• 4d3681c1 - [Data checks] Fix missing margin for solve buttons

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added 1 commit

• 9c91d140 - Simplify registering of data check results by adding a dedicated method

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added 1 commit

• 08c56188 - Add docstrings for data check system

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assigned to @nik

requested review from @debdolph

marked this merge request as ready