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

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

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

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+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, MaxLength, MinLength } from 'class-validator';
+import { IsIranMobile } from '../../../common/decorators/is-iran-mobile.decorator';
+
+export class LoginPasswordDto {
+  @ApiProperty({ example: '09122222222' })
+  @IsIranMobile()
+  mobile!: string;
+
+  @ApiProperty({ example: 'mySecurePass123' })
+  @IsString()
+  @MinLength(1)
+  @MaxLength(72)
+  password!: string;
+}

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

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+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;
+}