Fix image upload structure for Miravia API compliance

🔧 Bug Fixes:
- Fixed product image structure to match Miravia API requirements
- Updated MiraviaProduct.php getData() method to wrap images in {"Image": [...]} format
- Updated MiraviaCombination.php getData() method to wrap SKU images properly
- Resolved error "[4224] The Main image of the product is required"

📋 Changes:
- Modified getData() methods to transform flat image arrays to nested structure
- Product images: images[] → Images: {"Image": [...]}
- SKU images: images[] → Images: {"Image": [...]}
- Maintains backward compatibility for empty image arrays

🎯 Impact:
- Product uploads will now pass Miravia's image validation
- Both product-level and SKU-level images properly formatted
- Complies with official Miravia API documentation structure

🤖 Generated with Claude Code (https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

connector-miravia/classes/Sdk/AeSdk/demo/fileUploadDemo.php

@@ -0,0 +1,11 @@
+<?php
+
+use Sweeper\PlatformMiddleware\Sdk\AeSdk\Iop\IopClient;
+use Sweeper\PlatformMiddleware\Sdk\AeSdk\Iop\IopRequest;
+
+$c       = new IopClient('https://api.taobao.tw/rest', '${appKey}', '${appSecret}');
+$request = new IopRequest('/xiaoxuan/mockfileupload');
+$request->addApiParam('file_name', 'pom.xml');
+$request->addFileParam('file_bytes', file_get_contents('/Users/xt/Documents/work/tasp/tasp/pom.xml'));
+
+var_dump($c->execute($request));