fix(server): await thumbnail generation before returning (#3975)

* await sharp command, minor fixes

* removed outdated test

server/src/domain/media/media.service.ts

@@ -109,7 +109,7 @@ export class MediaService {
 
   async handleGenerateWebpThumbnail({ id }: IEntityJob) {
     const [asset] = await this.assetRepository.getByIds([id]);
-    if (!asset || !asset.resizePath) {
+    if (!asset) {
       return false;
     }