Artemis integration

[pal03377]

Related: ls1intum/Artemis#6861

Motivation and Context

Some changes are needed to integrate Athena into Artemis.

Description

Change a few things to make the integration work (also some general improvements):

• Remove the AvailableModuleNames enum because it always causes issues when some modules are unavailable while the assessment module manager is starting. Replaced it with a simple string.
• Add an HTTP Auth protected /logs endpoint to see Docker logs => easier testing without SSH test server access
• Change X-API-Secret header to Authorization for consistency within Artemis
• Add a cleanup step to deployment so that the test server disk doesn't get overloaded with cached docker images
• Download CoFee config files on the test server on deployment
• Use PostgreSQL database on the test server instead of SQLite for a more production-like environment
• Let /feedback endpoint receive multiple feedback objects at once instead of one at a time
• Make a few fields nullable because they are nullable in Artemis
• Rename TextSubmission.content to TextSubmission.text for consistency
• Add TextSubmission.language field that is important for CoFee (which only works on English submissions)
• Accept any incoming objects with camelCase attribute names instead of snake_case as well => avoid snake_case names in Artemis DTOs
• Make the CoFee MongoDB docker service a bit quieter because you couldn't find anything in the logs

Steps for Testing

Test ls1intum/Artemis#6861 using the instructions there

Screenshots

see ls1intum/Artemis#6861

[FelixTJDietrich]

Changes make sense to me and work as expected on the Athena testserver.