Two polish items surfaced during the digital-twin smoke test:
- audit-sheet append now retries transient throttles (THREADPOOL_BUSY /
timeout / 429) up to 3x with backoff, instead of silently dropping the
audit row on the first busy response. isTransientSheetErr keeps permanent
errors (bad node id, permission) non-retried.
- flushDeferred reports WHAT it completed (a numbered per-item list), not just
a count. When the owner is also the requester — the common self-request
case — this list is their only completion receipt, since notifyRequester
skips owner==requester to avoid double-messaging.
Tests: isTransientSheetErr classification, flush per-item completion report.
修雨
4d831e5054