NewController creates a new reporter.

Degraded status means something minor is preventing agent to work properly.

Failed status means agent is unable to work properly.

Healthy status means everything is fine.

AgentApplicationStatus returns the status of specific application.

AgentStatus returns the overall status of the Elastic Agent.

Controller takes track of component statuses.

Reporter reports status of component.

AgentStatusCode is the status code for the Elastic Agent overall.