Add password login, set-password, business images migration, and user serialization.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/modules/auth/dto/set-password.dto.ts

@@ -0,0 +1,22 @@
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+import { IsOptional, IsString, MaxLength, MinLength } from 'class-validator';
+
+export class SetPasswordDto {
+  @ApiPropertyOptional({ description: 'Required when changing an existing password' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(72)
+  currentPassword?: string;
+
+  @ApiProperty({ example: 'mySecurePass123', minLength: 8 })
+  @IsString()
+  @MinLength(8)
+  @MaxLength(72)
+  password!: string;
+
+  @ApiProperty({ example: 'mySecurePass123' })
+  @IsString()
+  @MinLength(8)
+  @MaxLength(72)
+  confirmPassword!: string;
+}