# What this PR does
Related to https://github.com/grafana/oncall/pull/5287
Few random "clean-ups", type improvements, etc.
Additionally, fixes a change made in #5292; we should wait to read from
`slack_message.channel.slack_id`, until we've performed the
data-migration mentioned in that PR (in the mean-time we should continue
to use `slack_message._channel_id`).
## Checklist
- [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.
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