Refactored Rolestage Endpoints and documentation

See merge request !22

Added documentation and changed the Endpoints to match Rest conventions, added query attributes for use-case, tables  and layers. Also modified a bit of repository and calculate similarity code to work with the refactoring/adding of use-cases and tables

Feature/schema mapping

See merge request !21

Bugfix/trace id deduplication

See merge request !20

type_label is in {'high', 'medium', 'low', 'noise'}