Devolutions Server health and readiness checks

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

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