feat: add Prometheus system monitoring

api/src/infrastructure-monitoring/infrastructure-monitoring.controller.ts

@@ -0,0 +1,14 @@
+import { Controller, Get, Query } from '@nestjs/common';
+import { ApiTags } from '@nestjs/swagger';
+import { InfrastructureMonitoringService } from './infrastructure-monitoring.service';
+
+@ApiTags('infrastructure-monitoring')
+@Controller('admin/infrastructure-monitoring')
+export class InfrastructureMonitoringController {
+  constructor(private readonly monitoring: InfrastructureMonitoringService) {}
+
+  @Get('overview')
+  overview(@Query('range') range?: string) {
+    return this.monitoring.overview(range);
+  }
+}