# What this PR does
Adds openAPI schema for following endpoints:
- /escalation_chain
- /escalation_policy
- /channel_filter
- /user_notification_policy
## Which issue(s) this PR closes
Related to https://github.com/grafana/oncall-private/issues/2457
## Checklist
- [ ] 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.
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Co-authored-by: Vadim Stepanov <vadimkerr@gmail.com>
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