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/inbox/inbox-migration.service.ts

@@ -28,17 +28,24 @@ export class InboxMigrationService implements OnApplicationBootstrap {
     @InjectRepository(InboxDocument)
     private readonly documentRepo: Repository<InboxDocument>,
   ) {
-    this.legacyRoot = this.configService.get<string>('SCANS_DATA_DIR', '/mnt/data/scans');
+    this.legacyRoot = this.configService.get<string>(
+      'SCANS_DATA_DIR',
+      '/mnt/data/scans',
+    );
   }
 
   async onApplicationBootstrap(): Promise<void> {
     let subdirs: string[];
     try {
-      const entries = await fs.readdir(this.legacyRoot, { withFileTypes: true });
+      const entries = await fs.readdir(this.legacyRoot, {
+        withFileTypes: true,
+      });
       subdirs = entries.filter((e) => e.isDirectory()).map((e) => e.name);
     } catch (err: any) {
       if (err.code !== 'ENOENT') {
-        this.logger.warn(`Migration: ${this.legacyRoot} nicht lesbar: ${err.message}`);
+        this.logger.warn(
+          `Migration: ${this.legacyRoot} nicht lesbar: ${err.message}`,
+        );
       }
       return;
     }
@@ -61,7 +68,9 @@ export class InboxMigrationService implements OnApplicationBootstrap {
           await this.migrateFile(src, subdir, name);
           migrated += 1;
         } catch (err: any) {
-          this.logger.error(`Migration fehlgeschlagen (${src}): ${err.message}`);
+          this.logger.error(
+            `Migration fehlgeschlagen (${src}): ${err.message}`,
+          );
         }
       }
 
@@ -75,7 +84,11 @@ export class InboxMigrationService implements OnApplicationBootstrap {
     }
   }
 
-  private async migrateFile(src: string, subdir: string, name: string): Promise<void> {
+  private async migrateFile(
+    src: string,
+    subdir: string,
+    name: string,
+  ): Promise<void> {
     const id = randomUUID();
     const source: InboxSource = subdir === 'all' ? 'all' : 'user';
     const owner = source === 'all' ? null : subdir;
@@ -115,7 +128,9 @@ export class InboxMigrationService implements OnApplicationBootstrap {
     }
   }
 
-  private async loadLegacyQrCodes(oldFilePath: string): Promise<StoredQrCode[]> {
+  private async loadLegacyQrCodes(
+    oldFilePath: string,
+  ): Promise<StoredQrCode[]> {
     try {
       const rows = await this.dataSource.query<LegacyScanRow[]>(
         'SELECT QrCodes FROM barcode_scans WHERE FilePath = ? LIMIT 1',