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/auth/permissions.guard.ts

@@ -8,32 +8,34 @@ export class PermissionsGuard implements CanActivate {
   constructor(private reflector: Reflector) {}
 
   canActivate(context: ExecutionContext): boolean {
-    const requiredPermissions = this.reflector.getAllAndOverride<Permission[]>(PERMISSIONS_KEY, [
-      context.getHandler(),
-      context.getClass(),
-    ]);
-    
+    const requiredPermissions = this.reflector.getAllAndOverride<Permission[]>(
+      PERMISSIONS_KEY,
+      [context.getHandler(), context.getClass()],
+    );
+
     if (!requiredPermissions) {
       return true;
     }
-    
+
     const request = context.switchToHttp().getRequest();
     const { user } = request;
 
     if (request.apiKeyMetadata) {
       return true;
     }
-    
+
     if (!user || !user.permissions) {
       return false;
     }
-    
+
     const userPermissions = user.permissions as Permission[];
-    
+
     if (userPermissions.includes(Permission.MANAGE_ALL)) {
       return true;
     }
-    
-    return requiredPermissions.some((permission) => userPermissions.includes(permission));
+
+    return requiredPermissions.some((permission) =>
+      userPermissions.includes(permission),
+    );
   }
 }