Delivered cron reminders are sent twice via heartbeat wake

[louiseboo]

Summary

When a user-facing Cron job succeeds with payload.deliver=true, Raven first delivers the generated reply through the hub or broadcast path. The same successful reply is then enqueued by _emit_cron_event and wakes Heartbeat, which can deliver it to the user a second time.

Steps to reproduce

1. Run the Raven gateway with Cron and Heartbeat event wake enabled.
2. Schedule a one-shot Cron reminder with deliver=true to a real channel.
3. Let the job fire successfully.
4. Observe the direct Cron delivery, followed by a second delivery from Heartbeat for the same job.

Expected behavior

A successful user-facing Cron job is delivered exactly once. Successful silent jobs may still wake Heartbeat, and failed jobs must still enqueue a failure event and wake Heartbeat.

Actual behavior

The same scheduled reminder is delivered once by the Cron hub/broadcast path and then again after the successful Cron result wakes Heartbeat.

Environment

OS: macOS 26.5.2
Shell: zsh
Python: 3.12.13
Installation: uv tool
Raven: main at f2b37c6 (runtime version 0.1.3)

Logs or screenshots

Sanitized event sequence:


08:50:10 Cron response delivered
08:50:10 Heartbeat checking for tasks (reason: cron:<job-id>)
08:50:54 Heartbeat delivered the same reminder


No private reminder content or recipient identifiers are included.