Critical issue notifications go to watching members, not on-call
Severity=critical still uses the same subscription table. Staff expected PagerDuty.
Document that TalkMoro is not an incident pager, or add a webhook example for topic.severity_changed.

Fix landed in
v2.9.1.Closing Critical issue notifications go to watching members, not on-call as fixed. Reopen if Valkey still serves a mixed page.