Resolve "Workflow usage statistics"

Closes #48 (closed)

src/client/workflow/models/WorkflowStatistic.ts

+/* istanbul ignore file */
+/* tslint:disable */
+/* eslint-disable */
+
+export type WorkflowStatistic = {
+    /**
+     * Day of the datapoint
+     */
+    day: string;
+    /**
+     * Number of started workflows on that day
+     */
+    count: number;
+};
+