Review fold-in on the salvage of #101877:
- `_deliver_result` routed to the durable queue whenever the worker's
`_HERMES_CRON_EXTERNAL_WORKER` marker was set, regardless of WHICH job was
delivering. A worker whose script dispatches another job in-process
(`hermes cron run <other>`) inherits that env and would have queued the
nested job's message under the outer execution id — `INSERT OR IGNORE`
then drops it silently. Match the marker against the delivering job's own
`execution_id`, as `run_one_job` already does. Regression test added
(mutation-checked: fails with the guard removed).
- A `pending` row left queued at the worker's wait timeout was still
reported as a delivery error, so `mark_job_run` recorded
`last_status=delivery_failed` for a message the next gateway's drain goes
on to send, and nothing ever corrects the job record. Log and return
success instead; the deliveries row is the authority for the send.
- Reuse `cron.executions._TERMINAL_STATES` in the parent wait loop instead
of a second hardcoded terminal set.
c3e9b28a42