* fix: add summary field in JSON output format
This fixes that the summary/description was not included in the feed.
As a side-note, we cannot remove the content_html field even if only the
summary/description is present.
> content_html and content_text are each optional strings — but one or
> both must be present.
* test: add JSON view tests
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* test: fix tests
* revert "fix: fill image from itunes_item_image (#16694)"
This reverts commit 879772a97f.
* fix: fill image from jsonfeed template
* chore: bump msw to 2.4.3