Add pow metrics

src/kv/kv.controller.ts

@@ -12,7 +12,7 @@ import {
 } from '@nestjs/common';
 import { KvService } from './kv.service';
 import { Request } from 'express';
-import { ApiTags } from '@nestjs/swagger';
+import { ApiQuery, ApiTags } from '@nestjs/swagger';
 import { FileInterceptor } from '@nestjs/platform-express';
 
 @Controller('kv')
@@ -21,6 +21,8 @@ export class KvController {
   constructor(private readonly kvService: KvService) { }
 
   @Get(':namespace/:key/metadata')
+  @ApiQuery({ name: 'namespace', required: true })
+  @ApiQuery({ name: 'key', required: true })
   async getMetadata(
     @Param('namespace') namespace: string,
     @Param('key') key: string,