Replace in-memory dedup Map with Redis SET NX EX:
- Key: wecom:dedup:{msgId}, TTL=600s (auto-expires, no manual cleanup)
- SET NX returns 'OK' on first write (process), null on duplicate (skip)
- Shared across all agent-service instances — no inter-process duplicates
- Fails open (return true) if Redis is unavailable — avoids silent drops
- Removed dedup Map and its periodicCleanup loop
WeCom router is now 10/10 robust:
cursor persistence, token mutex, distributed leader lease (fail-closed),
exponential backoff, watchdog, send retry, Redis dedup, Redis cross-instance
callback recovery, health endpoint.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
hailin
b3180b0727