- Add unregistered_senders table to capture dropped message origins
(one row per sender, upserted with message_count and last_seen)
- Add inbound DM logging to chat-sdk-bridge for debugging
- Add vercel CLI to base container image
- Install vercel-cli and frontend-engineer container skills
- Default requiresTrigger to false in register step
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>