add vm inventory update endpoint

db/queries/models.go

@@ -49,6 +49,17 @@ type Inventory struct {
 	VmUuid          sql.NullString
 }
 
+type InventoryHistory struct {
+	Hid                     int64
+	InventoryId             sql.NullInt64
+	ReportDate              sql.NullInt64
+	UpdateTime              sql.NullInt64
+	PreviousVcpus           sql.NullInt64
+	PreviousRam             sql.NullInt64
+	PreviousResourcePool    sql.NullString
+	PreviousProvisionedDisk sql.NullFloat64
+}
+
 type Updates struct {
 	Uid                int64
 	InventoryId        sql.NullInt64