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/agrarmonitor/agrarmonitor.controller.ts

@@ -20,7 +20,9 @@ export class AgrarmonitorController {
   @Post('register')
   @HttpCode(200)
   @RequirePermissions(Permission.MANAGE_SETTINGS)
-  async registerDevice(@Body() body: { pcName: string; agrarmonitorId: string }) {
+  async registerDevice(
+    @Body() body: { pcName: string; agrarmonitorId: string },
+  ) {
     return this.service.registerDevice(body.pcName, body.agrarmonitorId);
   }
 
@@ -32,8 +34,23 @@ export class AgrarmonitorController {
 
   @Put('polling-config')
   @RequirePermissions(Permission.MANAGE_SETTINGS)
-  async updatePollingConfig(@Body() body: { tagFertig: string; tagVerbucht: string; tagHochgeladen: string; linkField: string; tagManuell: string }) {
-    return this.pollingService.updatePollingConfig(body.tagFertig, body.tagVerbucht, body.tagHochgeladen, body.linkField, body.tagManuell ?? '');
+  async updatePollingConfig(
+    @Body()
+    body: {
+      tagFertig: string;
+      tagVerbucht: string;
+      tagHochgeladen: string;
+      linkField: string;
+      tagManuell: string;
+    },
+  ) {
+    return this.pollingService.updatePollingConfig(
+      body.tagFertig,
+      body.tagVerbucht,
+      body.tagHochgeladen,
+      body.linkField,
+      body.tagManuell ?? '',
+    );
   }
 
   @Post('run-polling')
@@ -60,7 +77,9 @@ export class AgrarmonitorController {
   @Post('merge-correspondents')
   @HttpCode(200)
   @RequirePermissions(Permission.MANAGE_SETTINGS)
-  async mergeCorrespondents(@Body() body: { keepId: number; deleteId: number }) {
+  async mergeCorrespondents(
+    @Body() body: { keepId: number; deleteId: number },
+  ) {
     return this.pollingService.mergeCorrespondents(body.keepId, body.deleteId);
   }
 }