* fix: based on #754 add 'omitempty' in ImageRequest to fit official api reference for relay
* Revert "fix: based on #754 add 'omitempty' in ImageRequest to fit official api reference for relay"
This reverts commit b526006ce07839f29b2d5b8c6a028147401ac295.
* fix: add missing omitempty
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Co-authored-by: JustSong <songquanpeng@foxmail.com>