The /client/imessage/send-queue/pending endpoint released up to 50 queued
sends per poll, so an enqueued burst all fired at once. Add a configurable
release cap: the endpoint now returns at most (maxSends − sent-in-window)
queued items, so a burst queues and drips out at the configured rate.
- macsync.send_rate_config single-row table, default max_sends=10,
window_seconds=300 (10 per 5 min).
- entities/send-queue repo: getSendRateConfig / setSendRateConfig /
countSentWithin.
- Admin control: GET/PUT /admin/send-rate-limit (service-token auth) so the
cap is adjustable at runtime (wired to MCP via quinn.api separately).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
