Fix image upload path error in ImageUploadListener (#200)

Fix image upload path error in ImageUploadListener (#200)

fix: resolve image upload path error in ImageUploadListener

- Fix ImageUploadListener to use correct file path from model
- Previously used file.name instead of file.path causing 'No such file or directory' error
- Update ImageUploadFactory to store complete file path in path field
- Update related tests to match corrected path structure
- Resolves 500 Internal Server Error when uploading images

The issue occurred because:
1. Controller stores full relative path (e.g., 'image_uploads/hash.jpg') in path field
2. Listener incorrectly concatenated directory + original filename
3. This caused exif_imagetype() to fail with file not found error

Changes:
- ImageUploadListener now uses Storage::disk()->path(file.path) directly
- ImageUploadFactory generates correct path structure for testing
- All tests updated to use file.path instead of file.path + '/' + file.name

Co-authored-by: Pascal HAVELANGE <havelangep@hotmail.com>