fix: add asset upload medium test (#25144)

server/src/dtos/asset-media.dto.ts

@@ -78,7 +78,7 @@ export class AssetMediaCreateDto extends AssetMediaBase {
   @Optional()
   @ValidateNested({ each: true })
   @IsArray()
-  metadata!: AssetMetadataUpsertItemDto[];
+  metadata?: AssetMetadataUpsertItemDto[];
 
   @ApiProperty({ type: 'string', format: 'binary', required: false })
   [UploadFieldName.SIDECAR_DATA]?: any;

server/src/repositories/asset.repository.ts

@@ -258,6 +258,10 @@ export class AssetRepository {
   }
 
   upsertMetadata(id: string, items: Array<{ key: string; value: object }>) {
+    if (items.length === 0) {
+      return [];
+    }
+
     return this.db
       .insertInto('asset_metadata')
       .values(items.map((item) => ({ assetId: id, ...item })))