first commit

src/history/dto/history-response.dto.ts

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+export type HistoryPointDto = {
+  t: number;
+  v: number;
+  min: number;
+  avg: number;
+  max: number;
+  count: number;
+};
+
+export type HistorySeriesDto = {
+  edge: string;
+  tag: string;
+  points: HistoryPointDto[];
+};
+
+export type HistoryResponseSource = 'empty' | 'latest' | 'raw' | '1m' | '5m' | '1h' | '1d';
+
+export type HistoryResponseDto = {
+  edge: string;
+  source: HistoryResponseSource;
+  targetPoints: number;
+  series: HistorySeriesDto[];
+  from?: Date;
+  to?: Date;
+  resolutionSeconds?: number | null;
+};