* API optimisation: more streaming of outputs
I spotted a memory issue when testing https://github.com/FreshRSS/FreshRSS/pull/7714
Attempt to stream results more, instead of keeping too much in memory.
Could be further improved.
* Apply suggestions from code review
Co-authored-by: Alexis Degrugillier <aledeg@users.noreply.github.com>
* Minor whitespace JSON formatting
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Co-authored-by: Alexis Degrugillier <aledeg@users.noreply.github.com>