- added property to assessmentFullBase so that we can decide if the assessment is null on the backend or not

- fixed small issue where in the tutor view the FeedbackForStudent was retuned as lastAssessmentErrorMessage
- changed all error reporting to output more verbose messages (default error toString)

- fixed issue where a null assessment would respond with an error even if this can happen and is valid in certain circumstances
  - e.g. auto assessment has not finished yet

- removed local appsettings
- added some debug output to track down an error

- wrapped every beginTransaction in a try so frontend and backend get more details if an error occurs
- removed transaction from creating exercise copy because it was not working (unknown reason, only in production environment)
- added self healing when saving an exercise that has no main file (first tempalte file will be used)

- fixed some issues where IsContentVisibleForUser was not applied correctly when reset code, saving files, saving after solution files...

- started new migration history (which removed some wrong shadow props)

- removed asset connected props

- create custom project no longer uses assets when frontend sends some

- fixed issue where some custom asset files are returned multiple times (in the same list) by the api

- moved some permission checks closer to method entry point

- forgot to add file worker
- renamed syndrom context (old) to yapex context
- renamed column CanReleaseExercises to CanManageExerciseReleases in GroupRolePermissions

- renamed schedulers to workers

- formatting

- changed get all asset in exercise editor to take the exerciseId because we want the files from all exercises (where the user has access to)

- removed file asset references file path

- fixes issue where everyone can see the members of a group
- changed check group permission to be a task (async)

- some cleanup