Enhance article photo handling and API documentation.

- Updated API documentation to reflect changes in article data structure.
- Improved ArticlePhoto component to support dynamic sizing and object fit options.
- Added performance logging for image upload in ArticlePhotosDialog and ArticlePhotoTile components.
- Enhanced ArticleTile to conditionally render photos and adjusted styling for better layout.
- Optimized image preparation process with configurable AVIF encoding speed.

src/components/article/ArticlePhotoTile.jsx

@@ -28,7 +28,13 @@ class ArticlePhotoTile extends Component {
     this.setState({ busy: true });
     try {
       const file = await prepareArticlePhoto(rawBlob);
+      const uploadStarted = performance.now();
       const res = await article.uploadImage(articleData.sku, file);
+      console.log('[article-photo] upload', {
+        uploadMs: Math.round(performance.now() - uploadStarted),
+        bytes: file.size,
+        sku: articleData.sku,
+      });
       requireObject(res, 'POST /api/article/:sku/image');
       requireObject(res.image, 'image');
       onArticleUpdated?.(articleWithUploadedPhoto(articleData, res.image));