Posture check: Azure SQL Server audit log retention is less than 91 days
Query: ```config from cloud.resource where cloud.type = 'azure' AND api.name = 'azure-sql-server-list' AND json.rule = serverBlobAuditingPolicy.properties.state equal ignore case Enabled and serverBlobAuditingPolicy.properties.storageEndpoint is not empty and (serverBlobAuditingPolicy.properties.retentionDays does not equal 0 and serverBlobAuditingPolicy.properties.retentionDays < 91)```