ObjectStoreExecutor.submit re-PUT the identical command.json on every
0.2s result poll, so a task running minutes wrote ~1,500 versions of one
engine-queue/search-exec/<id>/command.json. On the versioned memory
bucket that was the dominant growth: 109,715 versions, 10.3 GB (91% of
the bucket). retry_mailbox already retries a lost PUT acknowledgement
internally, so one upload per task is the correct delivery guarantee.
Guard the PUT with an `uploaded` flag: upload once (still retried on
transient failure), then poll only the result. One command.json version
per task instead of ~1,500. All submit semantics preserved.
59 executor tests pass, ruff clean.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
