Scenarios where active livestreams will not appear:
- creation date is way back.
- homepage section options excludes livestreams.
Make an explicit `claim_search` but with `has_no_source` if the client wants `liveLivestreamsFirst`.
If there are lots of channels with livestreams, there's a possibility that the final list will be larger than what was requested. We could trim it to be within the original `options.pageSize` range, but I left that out for now.
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