[x] Unit, integration, and e2e (if applicable) tests updated
[x] Documentation added (or pr:no public docs PR label added if not required)
[x] Added the relevant release notes label (see labels prefixed w/ release:). These labels dictate how your PR will
show up in the autogenerated release notes.
What this PR does
Backend portion of https://github.com/grafana/oncall-mobile-app/issues/1021
Checklist
pr:no public docsPR label added if not required)release:). These labels dictate how your PR will show up in the autogenerated release notes.