Add power database support

Power/Service/Data/Resources/GetStatusHistoryGrouped.sql

@@ -0,0 +1,14 @@
+SELECT Bucket,
+	   AVG(Generation) AS AverageGeneration,
+	   AVG(Consumption) AS AverageConsumption
+FROM (
+         SELECT CAST(FORMAT(Timestamp, 'yyyy-MM-ddTHH:') +
+                RIGHT('00' + CAST(DATEPART(MINUTE, Timestamp) / @BucketMinutes * @BucketMinutes AS VARCHAR), 2)
+				+ ':00+00:00' AS DATETIMEOFFSET)									  AS Bucket,
+                Generation,
+				Consumption
+         FROM Status
+         WHERE Timestamp BETWEEN @Start AND @End
+     ) AS Data
+GROUP BY Bucket
+ORDER BY Bucket