* added NoteService and related endpoints && tests
* removed snapshots
* corrected error in service
* removed snapshot
* added the ability to note down author using a string
* updated model for note
* refactored to access logged in user
* added other user id option
* removed snapshot
* updated according to feedback
* removed snapshots
* reintroduced snapshots
* updated to snake case
* removed try catch from use-db
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