```ruby
module Roqua
  module Healthy
    class UnknownFailure < StandardError; end
    class IllegalMirthResponse < StandardError; end
    class PatientIdNotInRemote < StandardError; end
    class Timeout < StandardError; end
    class HostUnreachable < StandardError; end
    class ConnectionRefused < StandardError; end

    class PatientNotFound < StandardError; end

    module MirthErrors
      class WrongPatient < StandardError; end
    end
  end
end```

Introduce base classes for exceptions
user
```ruby
module Roqua
  module Healthy
    class Error < StandardError; end
    class ConnectionError < Error; end
    
    class IllegalMirthResponse < ConnectionError; end
    class Timeout < ConnectionError; end
    class HostUnreachable < ConnectionError; end
    class ConnectionRefused < ConnectionError; end

    class UnknownFailure < Error; end
    class PatientIdNotInRemote < Error; end
    class PatientNotFound < Error; end

    module MirthErrors
      class WrongPatient < Error; end
    end
  end
end
```
assistant