* Fix aspect ratio in ImageReplyBodyView story
* De-flake blurhash story via per-story failureThreshold
Revert the aspectRatio change (it produced byte-identical blurhash output,
so it did not address the flake, and only churned the with-banner baseline)
and instead allow a small per-story failureThreshold on LoadingWithBlurhash.
The blurhash <canvas> rasterizes to one of two ~33px-apart variants per run;
this tolerates that benign jitter while keeping the strict 3px elsewhere.