Add historian persistence and dashboard trend charts

src/types/historian.ts

@@ -0,0 +1,12 @@
+export type HistorianSeriesPoint = {
+    timestamp: string;
+    numericValue: number | null;
+    booleanValue: boolean | null;
+    textValue: string | null;
+};
+
+export type HistorianDashboardResponse = {
+    from: string;
+    to: string;
+    series: Record<string, HistorianSeriesPoint[]>;
+};