The availability status of the resource.
0 - Available - no events detected that affect the health of the resource.
1 - Degraded  - your resource detected a loss in performance, although it's still available for use.
2 - Unavailable - the service detected an ongoing platform or non-platform event that affects the health of the resource.
3 - Unknown - Resource Health hasn't received information about the resource for more than 10 minutes.