Switch dashboard/map/history views to archive source for long-term data

Update fail2ban dbpurgeage to 648000 and history sync backfill/pagination for archive-based 7.5 day history.

frontend/src/components/BanTrendChart.tsx

@@ -53,6 +53,8 @@ interface BanTrendChartProps {
   timeRange: TimeRange;
   /** Origin filter controlling which bans are included. */
   origin: BanOriginFilter;
+  /** Data source used for the chart. */
+  source?: "fail2ban" | "archive";
 }
 
 /** Internal chart data point shape. */
@@ -188,9 +190,10 @@ function TrendTooltip(props: TooltipContentProps): React.JSX.Element | null {
 export function BanTrendChart({
   timeRange,
   origin,
+  source = "fail2ban",
 }: BanTrendChartProps): React.JSX.Element {
   const styles = useStyles();
-  const { buckets, isLoading, error, reload } = useBanTrend(timeRange, origin);
+  const { buckets, isLoading, error, reload } = useBanTrend(timeRange, origin, source);
 
   const isEmpty = buckets.every((b) => b.count === 0);
   const entries = buildEntries(buckets, timeRange);