annual-reports: add dedicated API #20

Job	Run time
test (Library-Notification-Service) / lint	13s
test (Library-Notification-Service) / tests	16s
test (annual-reports) / tests	32s
test (annual-reports) / lint	9s
test (matomo-api) / lint	10s
test (matomo-api) / tests	29s
release (annual-reports, cern-sis/annual-reports) / build-image	7m 2s
release (Library-Notification-Service, cern-sis/library-notifications-service) / build-image	2m 1s
release (matomo-api, cern-sis/matomo-api) / build-image	6m 30s
	17m 22s

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