Average grades in export #3821

Job	Run time
Compile Scss	1m 38s
Backup process	3m 7s
Formatting	1m 38s
Build wheel	2m 2s
Linter	2m 14s
Build nix environment on MacOS	3m 46s
MyPy	1m 39s
Test + Coverage	2m 45s
Render Html pages	1m 51s
Test (shuffled order)	2m 22s
Test Typescript	1m 49s
Install wheel with system Python	13s
	25m 4s

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