6b79aa997 bounded WriteBatchSync itself, which broke its read-your-writes
contract on slow disks: CI's metrics write-amplification and 500-node
load tests count committed rows after writing, and mock seeding reads
store coverage straight back, so the 2-second early return failed both
(runs 31475700902, 31494553977). Fast local disks masked it.
WriteBatchSync returns to a full commit wait. The monitoring pipeline's
four sync sites move to WriteBatchBounded, which carries the bounded
enqueue-plus-wait semantics, so the #1437 slow-disk stall fix stays
exactly where the hazard is. Both paths share prepareWriteBatch
validation, and a new regression test pins WriteBatchSync waiting past
the bounded budget.
Refs #1437
Contract-Neutral: behavioral fix: split bounded pipeline writes from synchronous batch writes, restores read-your-writes (#1437 follow-up), no public contract delta
rcourtman
2bc4ed7254