refactor(server): bull jobs (#2569)

* refactor(server): bull jobs

* chore: add comment

* chore: metadata test coverage

* fix typo

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Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

server/libs/domain/src/facial-recognition/facial-recognition.services.ts

@@ -104,7 +104,7 @@ export class FacialRecognitionService {
       const [asset] = await this.assetRepository.getByIds([assetId]);
       if (!asset || !asset.resizePath) {
         this.logger.warn(`Asset not found for facial cropping: ${assetId}`);
-        return null;
+        return;
       }
 
       this.logger.verbose(`Cropping face for person: ${personId}`);