* Stop a replica cache read from spinning when the store rejects its writes
A replica cache read waits for accepted commits to reach the row store
before it answers, and retries until the store agrees. When the store
rejects the write deterministically, that retry never makes progress: the
read loops on flush and read with no delay, burning a core and never
returning. The read now fails closed on a rejected write, so callers fall
back to the daemon instead of the loop saturating the renderer.
* Fail a read closed only when its own host has unwritten changes
A rejected write carries whatever was pending across every host, so
giving up the read on any rejection hid stored rows from hosts that had
nothing pending. A host whose rows are already in the store stays
readable while another host's write keeps failing.
* Bound the read count in the storage fake instead of the test body
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Co-authored-by: paseo-bot[bot] <266920839+paseo-bot[bot]@users.noreply.github.com>
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