Devolutions Server health and readiness checks

Devolutions Server workspaces' health and readiness can be quickly verified using the following endpoints:

Endpoints	Response
`/health`	`200`: The Devolutions Server workspace is healthy and the scheduler is up and running. `503`: The workspace is unhealthy and/or the scheduler is down.
`/ready`	`200`: The Devolutions Server workspace is ready for use. `503`: The workspace is currently in migration.