Alerting needs to be implemented for ClearlyDefined

Per Gene:

For the alerts, besides the regular stuff, Azure Search indexer should be monitored for errors, Redis should be monitored for max capacity, CosmosDB should be monitored for any errors. Crawlers should be monitored for the disk space and CPU. We have the monitoring in place for the number of messages in the queues and curation failures. Availability alerts should be added to.