#33 Controller skeleton
#33 Service test implementation
#33 GUI: events directive
#33 GUI: loading the events
#33 GUI: service to render an event
#33 GUI: event rendering (wip)
#33 GUI: event rendering: values and entities
#33 Event model for values: key -> name/value
#33 GUI: promotion level decoration
#33 GUI: validation stamp decoration
#33 GUI: validation run status decoration
#33 GUI: signature
#33 GUI: styling