58 refactor reveaal and user endpoint tests

[williamwoldum]

closes #61

• Refactors user-endpoint and session-endpoint tests to use mock structure
• Includes new Github Actions test workflow that uses Postgres DB
• Made new hashing dependancy (bcrypt) injectable
  • This might seem overkill but it:
    • Allows us to mock bcrypt when testing user_logic.rs
    • Allows us to easily change encryption service in the future 🤷‍♂️
• Made ContextCollection struct to reduce arguments (complaint by clippy)
• Update tests modules paths
  • Resulted in a lot of indentation changes in test files which can be overlooked
  • Focus on test.yaml, tests/api/session_logic.rs, and tests/api/user_logic.rs as these are the only files with real changes

[sabotack]

se @MadsSR's kommentar, ellers LGTM! 👍️