🛡️ Pro tip for building reliable Events APIs: Network delays, retries & hiccups make duplicate events inevitable. (Double charges, repeated notifications, messed-up state - all bad.) Fix it with idempotency_key: ✅ Clients send a unique key (UUID works great) with every event ✅ Your API stores processed keys in the DB (unique constraint). ✅ Seen before? Ignore & return success. ✅ New? Process & record it. I just added full support for it in #telesink.