Enhancement/Spike: Improve role handling #32
Description
Currently the ml-forecast service expects read:admin write:admin roles (#3)
These are quite broad and don't indicate that they provide access to this service, therefore ideally the service has more specific roles such as write:config-forecast read:config-forecast or something similar.
Investigate this particular issue and detail a method on how to implement more granular and service-specific roles.
Ideally this implementation allows annotation similar to JAX-RS e.g. RolesAllowed this should be fairly straight forward using python decorators. This can also then be used to automatically exclude paths from the middleware that are missing the appropriate annotation.