feat: add database indexes, implement CORS configuration, and lazy-load frontend routes

paperless-backend/src/database/entities/label-print-job.entity.ts

@@ -2,6 +2,7 @@ import {
   Entity,
   PrimaryGeneratedColumn,
   Column,
+  Index,
   CreateDateColumn,
 } from 'typeorm';
 
@@ -10,6 +11,7 @@ export class LabelPrintJob {
   @PrimaryGeneratedColumn()
   Id!: number;
 
+  @Index()
   @Column({ type: 'varchar', length: 20, default: 'pending' })
   Status!: 'pending' | 'printed' | 'error';
 
@@ -28,6 +30,7 @@ export class LabelPrintJob {
   @Column({ type: 'simple-json', nullable: true })
   LabelVariables!: Record<string, string> | null;
 
+  @Index()
   @Column({ type: 'datetime', nullable: true })
   LockedAt!: Date | null;