feat: expand backend admin marketplace and scaling

src/modules/posts/dto/admin-post-query.dto.ts

@@ -0,0 +1,16 @@
+import { ApiPropertyOptional } from '@nestjs/swagger';
+import { IsEnum, IsMongoId, IsOptional } from 'class-validator';
+import { ModerationStatus } from '../../../common/enums/moderation-status.enum';
+import { PostQueryDto } from './post-query.dto';
+
+export class AdminPostQueryDto extends PostQueryDto {
+  @ApiPropertyOptional({ description: 'Optional author filter' })
+  @IsOptional()
+  @IsMongoId()
+  authorId?: string;
+
+  @ApiPropertyOptional({ enum: ModerationStatus, description: 'Optional moderation status filter' })
+  @IsOptional()
+  @IsEnum(ModerationStatus)
+  moderationStatus?: ModerationStatus;
+}