chore: apply ESLint auto-fix across entire backend

Reformats code style (line breaks, indentation, type annotations)
without changing logic. Also includes minor feature additions bundled
in the same lint run (stats service, user-settings groups, agrarmonitor
polling improvements).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

paperless-backend/src/user-settings/user-settings.controller.ts

@@ -1,4 +1,12 @@
-import { Body, Controller, Get, HttpCode, Post, Put, Request } from '@nestjs/common';
+import {
+  Body,
+  Controller,
+  Get,
+  HttpCode,
+  Post,
+  Put,
+  Request,
+} from '@nestjs/common';
 import { UserSettingsService } from './user-settings.service';
 import { RequirePermissions } from '../auth/permissions.decorator';
 import { Permission } from '../auth/permissions.enum';
@@ -9,12 +17,23 @@ export class UserSettingsController {
 
   @Get()
   async getSettings(@Request() req: any) {
-    return this.userSettingsService.getSettings(req.user.userId, req.user.email, req.user.preferredUsername, req.user.groups);
+    return this.userSettingsService.getSettings(
+      req.user.userId,
+      req.user.email,
+      req.user.preferredUsername,
+      req.user.groups,
+    );
   }
 
   @Put()
   async updateSettings(@Request() req: any, @Body() body: any) {
-    return this.userSettingsService.updateSettings(req.user.userId, body, req.user.email, req.user.preferredUsername, req.user.groups);
+    return this.userSettingsService.updateSettings(
+      req.user.userId,
+      body,
+      req.user.email,
+      req.user.preferredUsername,
+      req.user.groups,
+    );
   }
 
   @Get('senders')
@@ -25,7 +44,16 @@ export class UserSettingsController {
   @Post('test-smtp')
   @HttpCode(200)
   @RequirePermissions(Permission.MANAGE_SETTINGS)
-  async testSmtp(@Body() body: { host: string; port: number; secure: boolean; user: string; pass: string }) {
+  async testSmtp(
+    @Body()
+    body: {
+      host: string;
+      port: number;
+      secure: boolean;
+      user: string;
+      pass: string;
+    },
+  ) {
     return this.userSettingsService.testSmtp(body);
   }
 }